Publications

CamNtech Research Library

 

CamNtech products have been trusted by specialist researchers for 25 years. Our research library contains peer reviewed publications citing the use of our devices. Filter by product, application, keyword, author or use free text search to locate your area of interest.

  • Application

  • Keywords

  • Author

Found 105 Results

An Automatic Estimation of the Rest-Interval for MotionWatch8© Using Uniaxial Movement and Lux Data

Poor sleep is linked with chronic conditions common in older adults, including diabetes, heart disease, and dementia. Valid and reliable field methods to objectively measure sleep are thus greatly needed to examine how poor sleep impacts older adults. Wrist-worn actigraphy (WWA) is a common objective measure of sleep that uses motion and illuminance data to […]

Related Product: MotionWatch

Publication Date: August 24, 2020


Binocular Vision, Visual Function, and Pupil Dynamics in People Living With Dementia and Their Relation to the Rate of Cognitive Decline and Structural Changes Within the Brain: Protocol for an Observational Study

Background: Visual impairment is a common comorbidity in people living with dementia. Addressing sources of visual difficulties can have a significant impact on the quality of life for people living with dementia and their caregivers. Depth perception problems are purportedly common in dementia and also contribute to falls, visuomotor task difficulties, and poorer psychosocial well-being. […]

Related Product: MotionWatch

Publication Date: August 10, 2020


Local increases in sleep-like activity predict the occurrence of emotion suppression failures

Emotion self-regulation relies both on cognitive and behavioral strategies implemented to modulate the subjective experience and/or the behavioral expression of a given emotion. While it is known that a network encompassing fronto-cingulate and parietal brain areas is engaged during successful emotion regulation, the functional mechanisms underlying failures in emotion suppression are still unclear. In order […]

Related Product: MotionWatch

Publication Date: August 5, 2020


Reduced Neuromuscular Performance in Night Shift Orthopedic Nurses: New Insights From a Combined Electromyographic and Force Signals Approach

The effect of sleep–wake rhythm disruption on neuromuscular control and muscle fatigue has received little attention. Because nurse shift work is so varied, including overnight duty, rotating shift schedules, early awakening, and interrupted nocturnal sleep, it offers an interesting model to study this paradigm. It has been investigated so far using only subjective markers. A […]

Related Product: MotionWatch

Publication Date: June 30, 2020


The clinical relevance of early identification and treatment of sleep disorders in mental health care: protocol of a randomized control trial

Background Sleep disorders are a risk factor for developing a variety of mental disorders, have a negative impact on their remission rates and increase the risk of relapse. Early identification and treatment of sleep disorders is therefore of paramount importance. Unfortunately, in mental health care sleep disorders are often poorly recognized and specific treatment frequently […]

Related Product: MotionWatch

Publication Date: June 24, 2020


Toward a Better Understanding of the Reciprocal Relations Between Adolescent Psychological Need Experiences and Sleep

In two diary studies, we examined the reciprocal daily association between the satisfaction and frustration of adolescents’ basic psychological needs and sleep, and the role of stress and fatigue in these associations. In Study 1 (N = 211; 52% female; Mage = 15.86 years, SD = 1.18 years), daily need experiences were unrelated to daily […]

Related Product: MotionWatch

Publication Date: June 19, 2020


Light effects on circadian and homeostatic regulation: alertness increases independent of time awake

Study Objectives To determine how sleepiness and sleep deprivation drive the motivation to engage in different behaviors. Methods We studied the sleepiness of 123 participants who had been randomized to sleep deprivation or normal sleep, and their willingness to engage in a range of everyday behaviors. Results Self-reported sleepiness was a strong predictor of the […]

Related Product: MotionWatch

Publication Date: June 6, 2020


Early manifestation of sleep problems in toddlers with Williams Syndrome using a mixed method longitudinal approach

Children with neurodevelopmental disorders commonly experience sleep problems. Williams Syndrome (WS), a rare genetic disorder characterised by a complex, uneven cognitive profile, is no exception. Compared with children with typical development (TD), school-aged children with WS experience significant sleep disruption: shorter sleep duration, more night wakings, greater bedtime resistance and excessive daytime tiredness. In children […]

Related Product: MotionWatch

Publication Date: June 3, 2020


Sleep duration, sleep variability, and impairments of visual attention

Attentional networks are sensitive to sleep deprivation. However, variation in attentional performance as a function of normal sleep parameters is understudied. We examined whether attentional performance is influenced by (a) individual differences in sleep duration, (b) sleep duration variability, and/or (c) their interaction. A total of 57 healthy participants (61.4% female, Mage = 32.37 years, SD = 8.68) completed questionnaires, […]

Related Product: MotionWatch

Publication Date: June 1, 2020


Gateways, Disparities, and Finals Week, Oh My! Translating Sleep Science from the Laboratory to the Classroom

Introduction Organic chemistry can be an insurmountable “gateway” course for otherwise-qualified students in pre-health pathways. Recent data indicate that organic chemistry increases drop-out risk for females and underrepresented minority students (URMs), raising the provocative possibility that sleep disparities are an underrecognized contributor to achievement gaps in gateway STEM courses. Methods In Study 1, 481 students […]

Related Product: MotionWatch

Publication Date: May 27, 2020


Subjective–objective sleep discrepancy in patients with insomnia during and after cognitive behavioural therapy: An actigraphy study

Although patients with insomnia often show a discrepancy between self‐reported and objective sleep parameters, the role of and change in this phenomenon during treatment remain unclear. The present study aimed to assess the effect of cognitive behavioural therapy for insomnia on subjective and objective sleep discrepancy of total sleep time, sleep‐onset latency and wake after […]

Related Product: MotionWatch

Publication Date: May 20, 2020


Effect of a Multimodal Lifestyle Intervention on Sleep and Cognitive Function in Older Adults with Probable Mild Cognitive Impairment and Poor Sleep: A Randomized Clinical Trial

Background:Poor sleep is common among older adults with mild cognitive impairment (MCI) and may contribute to further cognitive decline. Whether multimodal lifestyle intervention that combines bright light therapy (BLT), physical activity (PA), and good sleep hygiene can improve sleep in older adults with MCI and poor sleep is unknown. Objective:To assess the effect of a […]

Related Product: MotionWatch

Publication Date: May 19, 2020


Observation and interview-based diurnal sleepiness inventory for measurement of sleepiness in patients referred for narcolepsy or idiopathic hypersomnia

STUDY OBJECTIVES:First, to determine whether the three-item ODSI (Observation and interview based Diurnal Sleepiness Inventory) measures the degree of excessive daytime sleepiness (EDS) in patients with suspected narcolepsy or idiopathic hypersomnia (IH). Second, to assess the correlation between the ODSI and the Epworth Sleepiness Scale (ESS) as well as objective polysomnographic measurements. Third, to test […]

Related Product: MotionWatch

Publication Date: May 14, 2020


Feasibility of a complex setting for assessing sleep and circadian rhythmicity in a Fragile X cohort

Introduction Sleep, circadian rhythms, (mental) health, and development are assumed to be intertwined. However, differentiated and reliable parameters of sleep and circadian rhythms are particularly difficult to assess for Fragile X (FXS) individuals. As those parameters need to be observed in complex settings, the feasibility of measurements for people with FXS was to be proven. […]

Related Product: MotionWatch

Publication Date: May 14, 2020


Schizophrenia-associated variation at ZNF804A correlates with altered experience-dependent dynamics of sleep slow-waves and spindles in healthy young adults

Background The rs1344706 polymorphism in ZNF804A is robustly associated with schizophrenia (SZ), yet brain and behavioral phenotypes related to this variant have not been extensively characterized. In turn, SZ is associated with abnormal non-rapid eye movement (NREM) sleep neurophysiology. To examine whether rs1344706 is associated with intermediate neurophysiological traits in the absence of disease, we […]

Related Product: MotionWatch

Publication Date: May 3, 2020


Sleep disturbance in atopic dermatitis: a case–control study using actigraphy and smartphone‐collected questionnaires

No abstract is available for this article.

Related Product: MotionWatch

Publication Date: April 22, 2020


Refining sleep measurement using the Motionwatch8©: How many days of monitoring do we need to get reliable estimates of sleep quality for older adults with Mild Cognitive Impairment?

Background Mild cognitive impairment (MCI) is a transition stage between healthy cognition and dementia, and is linked to poorer sleep. Objective, reliable, and low-burden field methods to measure older adult sleep are also currently needed. The MotionWatch8© (MW8) wrist-worn actigraph provides estimates of sleep with 14 days of observation; however, there may be underlying differences […]

Related Product: MotionWatch

Publication Date: April 3, 2020


Fractal biomarker of activity in patients with bipolar disorder

Background The output of many healthy physiological systems displays fractal fluctuations with self-similar temporal structures. Altered fractal patterns are associated with pathological conditions. There is evidence that patients with bipolar disorder have altered daily behaviors. Methods To test whether fractal patterns in motor activity are altered in patients with bipolar disorder, we analyzed 2-week actigraphy […]

Related Product: MotionWatch

Publication Date: April 1, 2020


Napping in high-performance athletes: sleepiness or sleepability?

Daytime napping is a common practice in high-performance athletes, and is widely assumed to reflect sleepiness arising from sports-related sleep debt. The possibility that athlete naps may also be indicative of ‘sleepability’, a capacity to nap on demand that is only weakly related to homeostatic sleep pressure, has not previously been tested. The present study […]

Related Product: MotionWatch

Publication Date: March 16, 2020


Prospective association between suicide cognitions and emotional responses to a laboratory stressor: The mediating role of nightly subjective sleep quality

Background Sleep is a reliable correlate of suicidal thoughts and behaviors (STBs), yet few studies have directly examined negative affect in the context of this association. The present study combined daily experience methods with a laboratory paradigm to investigate suicide cognitions as a predictor of emotional responses to environmental stressors, and tested the role of […]

Related Product: MotionWatch

Publication Date: March 15, 2020


Sleep and intrusive memories immediately after a traumatic event in emergency department patients

Study objectives Intrusive memories of psychological trauma are a core clinical feature of posttraumatic stress disorder (PTSD), and in the early period post-trauma may be a potential target for early intervention. Disrupted sleep in the weeks post-trauma is associated with later PTSD. The impact of sleep and intrusive memories immediately post-trauma, and their relation to […]

Related Product: MotionWatch

Publication Date: March 5, 2020


Acupuncture for insomnia with short sleep duration: protocol for a randomised controlled trial

Introduction Insomnia with short sleep duration has a more serious negative impact on patient health. The existing literature suggests that medication therapy is more effective for this phenotype of insomnia compared with cognitive–behavioural therapy. However, the potential side effects of hypnotic medications hinder their clinical application. Acupuncture has been widely used in the treatment of […]

Related Product: MotionWatch

Publication Date: March 1, 2020


Primary care treatment of insomnia: study protocol for a pragmatic, multicentre, randomised controlled trial comparing nurse-delivered sleep restriction therapy to sleep hygiene (the HABIT trial)

Introduction Insomnia is a prevalent sleep disorder that negatively affects quality of life. Multicomponent cognitive-behavioural therapy (CBT) is the recommended treatment but access remains limited, particularly in primary care. Sleep restriction therapy (SRT) is one of the principal active components of CBT and could be delivered by generalist staff in primary care. The aim of […]

Related Product: MotionWatch

Publication Date: March 1, 2020


Correlates of disrupted sleep–wake variables in patients with advanced cancer

Objectives High rates of sleep difficulties have been found in patients with advanced cancer. However, not much is known about factors that are associated with sleep impairments in this population and that could constitute their potential risk factors or consequences. This study conducted in patients with cancer receiving palliative care aimed to evaluate the relationships […]

Related Product: MotionWatch

Publication Date: February 19, 2020


Sleep disruption after brain injury is associated with worse motor outcomes and slower functional recovery

Background and Aims: Sleep is important for consolidation of motor learning, but brain injury may affect sleep continuity and therefore rehabilitation outcomes. This study aims to assess the relationship between sleep quality and motor recovery in brain injury patients receiving inpatient rehabilitation. Methods: 59 patients with brain injury were recruited from two specialist inpatient rehabilitation […]

Related Product: MotionWatch

Publication Date: February 18, 2020


Scheduled afternoon–evening sleep leads to better night shift performance in older adults

Objectives This study investigated whether an intervention designed to reduce homeostatic sleep pressure would improve night shift performance and alertness in older adults. Methods Non-shift workers aged 57.9±4.6 (mean±SD) worked four day (07:00–15:00) and four night shifts (23:00–07:00). Two intervention groups were instructed to remain awake until ~13:00 after each night shift: the sleep timing group (ST; […]

Related Product: MotionWatch

Publication Date: February 13, 2020


Implementing a hybrid cognitive-behavioural therapy for pain-related insomnia in primary care: Lessons learned from a mixed-methods feasibility study

Objectives To test the feasibility of implementing a brief but intensive hybrid cognitive behavioural therapy (Hybrid CBT) for pain-related insomnia. Design Mixed-methods, with qualitative process evaluation on a two-arm randomised controlled feasibility trial. Setting Primary care. Participants Twenty-five adult patients with chronic pain and insomnia. Intervention Hybrid CBT or self-help control intervention. Primary and secondary outcome measures Primary outcomes measures were […]

Related Product: MotionWatch

Publication Date: February 1, 2020


Transitions in Depression (TRANS-ID) Recovery: Study protocol for a repeated intensive longitudinal n= 1 study design to search for personalized early warning signals of critical transitions towards improvement in depression

The Transitions in Depression (TRANS-ID) Recovery study is aimed at gathering intensive longitudinal data in a group of depressed patients during psychological therapy. Per person, we gathered between 500-600 momentary measurements of mood (5 times a day, for 4 months) using the Experience Sampling Method (ESM), as well as weekly symptom checklists and heart rate […]

Related Product: MotionWatch

Publication Date: February 1, 2020


Insomnia does not affect heart rate changes when young adults watch humorous films: An exploratory study

Emotional reactivity in insomnia is affected both subjectively and on a physiological level for negative emotional material, but little is known about reactions to positive stimuli. We here investigated whether in younger adult insomnia patients, presentation of short humorous films would lead to heart rate decreases during and after film viewing, as compared to heart […]

Related Product: MotionWatch

Publication Date: December 23, 2019


The Teensleep Study: the effectiveness of a school-based sleep education programme at improving early adolescent sleep.

Objective To evaluate the impact of a school-based sleep education programme on adolescent sleep and sleep knowledge. Methods This is the first outcome report on ‘Teensleep’: a novel, teacher-led programme, comprising ten lessons that can be delivered flexibly. Students in Year 10 (n = 1504; mean age = 14.14 ± 0.35 years) from ten UK […]

Related Product: MotionWatch

Publication Date: December 7, 2019


Sleepiness as motivation: a potential mechanism for how sleep deprivation affects behavior

Study Objectives To determine how sleepiness and sleep deprivation drive the motivation to engage in different behaviors. Methods We studied the sleepiness of 123 participants who had been randomized to sleep deprivation or normal sleep, and their willingness to engage in a range of everyday behaviors. Results Self-reported sleepiness was a strong predictor of the […]

Related Product: MotionWatch

Publication Date: November 29, 2019


Sleep quality and clinical and psychological manifestations in women with mild systemic lupus erythematosus activity compared to women with fibromyalgia: A preliminary study

Objectives: This study analyzed sleep quality in fibromyalgia (FM) and systemic lupus erythematosus (SLE) and explored its relationship with other clinical and psychological manifestations. Methods: Twenty women with FM, 19 women with SLE and 22 healthy women participated in the study. Subjective sleep quality, fatigue, pain, depression and anxiety were evaluated with self-reports, and objective […]

Related Product: MotionWatch

Publication Date: November 14, 2019


Dynamic metabolic changes in the human thalamus at the transition from waking to sleep-insights from simultaneous MR spectroscopy and polysomnography

An important contribution of the thalamus to the transition from wakefulness to sleep is a consistent finding in animal studies. In humans, only little is currently known about the specific role of the thalamus in regulating wake-sleep transitions. Although changes in thalamic blood flow and activity have been reported, the underlying molecular mechanisms have not […]

Related Product: MotionWatch

Publication Date: October 30, 2019


Use of an ANN to Value MTF and Melatonin Effect on ADHD Affected Children

Sleep disorders is one of the most frequent child medical consultation, indeed the rate of children that suffer it in a transitory way is considerably high. Among the most common sleep disorders is named ”children behavioral insomnia”, many different drugs has been used as treatment with poor results with relevant secondary effects. We focus on […]

Related Product: MotionWatch

Publication Date: September 26, 2019


A Deep Learning Approach for Sleep-Wake Detection from HRV and Accelerometer Data

Sleep-wake classification is important for measuring the sleep quality. In this paper, we propose a novel deep learning framework for sleep-wake detection by using acceleration and heart rate variability (HRV) data. Firstly, considering the high sampling rate of acceleration data with temporal dependency, we propose a local feature based long short-term memory (LF-LSTM) approach to […]

Related Product: MotionWatch

Publication Date: September 12, 2019


A. Protocol: Using N-of-1 tests to identify responders to melatonin for sleep disturbance in Parkinson’s disease

Background 40% of Parkinson’s Disease (PD) sufferers experience insomnia, impacting health and quality of life for patients and family members, especially carers. There is little evidence that current treatments are effective. Objectives To determine the effectiveness of melatonin in reducing insomnia in 44 individuals with PD using N-of-1 trials. To aggregate group data to arrive […]

Related Product: MotionWatch

Publication Date: September 1, 2019


Validity of actigraphy compared to polysomnography for sleep assessment in children with autism spectrum disorder

Actigraphy (ACT) is a non-invasive objective assessment tool for the study of sleep–wake rhythms. It is of particular interest in children with autism spectrum disorder (ASD), as sleep disorders are highly prevalent and have a significant impact on both cognitive and behavioral functions. As polysomnography (PSG), the gold standard for the assessment of sleep, is […]

Related Product: MotionWatch

Publication Date: August 2, 2019


Prebiotic supplementation does not affect reading and cognitive performance in children: A randomised placebo-controlled study

Based on the emerging interest in the effects of gut microbiota on cognition, this proof-of-concept study assessed how children aged 7 to 9 with low reading scores responded to the ingestion of a 3-month prebiotic supplement versus a placebo. As a secondary aim, the effects of the prebiotic on cognition, sleep, behaviour, mood, anxiety, and […]

Related Product: MotionWatch

Publication Date: July 25, 2019


Neurobiological Basis of Sleep and Wake Dysfunction In AD and Other Tauopathies: The Role of the Neuromodulatory System

Wake, sleep and circadian disturbances are common occurrences in Alzheimer’ disease (AD) and other tauopathies often preceding disease-defining symptoms. Clinical data point to a divergent sleep-wake behavior profiles among tauopathies which probably reflects their differential pattern of neuronal vulnerability and spread and thus, have implications for developing symptomatic and disease-modifying treatments. Although some aspects of […]

Related Product: MotionWatch

Publication Date: July 14, 2019


Actigraphic Screening for Rapid Eye Movement Sleep Behavior Disorder

Background: The patients suffering of the rapid eye movement sleep behavior disorder (RBD) are in high risk of developing a neurodegenerative disorder, most frequently from the group of alpha-synucleinopathies, such as Parkinson’s disease (PD), Dementia with Lewy Bodies (DLB) or multiple system atrophy (MSA). The definitive diagnosis of RBD is based on polysomnographic investigation. Actigraphy […]

Related Product: MotionWatch

Publication Date: July 14, 2019


Sleep Quality and Quantity of International Rugby Sevens Players During Pre-season

The aim of this study was to investigate the influence of training load on objective and subjective sleep measures among elite rugby sevens players during pre-season. Nine international male rugby sevens players participated in this study. Actigraphic and subjective sleep assessment were performed on a daily basis to measure sleep parameters. Training load was measured […]

Related Product: MotionWatch

Publication Date: July 1, 2019


Visual imagery and visual perception induce similar changes in occipital slow waves of sleep

Related Product: MotionWatch

Publication Date: June 10, 2019


The effect of sleep deprivation on objective and subjective measures of facial appearance

The faces of people who are sleep deprived are perceived by others as looking paler, less healthy and less attractive compared to when well rested. However, there is little research using objective measures to investigate sleep‐loss‐related changes in facial appearance. We aimed to assess the effects of sleep deprivation on skin colour, eye openness, mouth […]

Related Product: MotionWatch

Publication Date: April 21, 2019


The effects of brief chat-based and face-to-face psychotherapy for insomnia: A randomized waiting list controlled trial

Background Recent studies have directly compared the effects of Internet-based self-help interventions with face-to-face (FtF) treatment, but groups may also differ regarding other aspects, aside from the fact that the former is online and the latter offline. Thus, we examined the effects of a brief three-session psychotherapy for insomnia that was delivered FtF or through […]

Related Product: MotionWatch

Publication Date: April 19, 2019


Time-of-day and days-on-shift predict increased fatigue over two-week offshore day-shifts

Objectives The purpose of this study was to investigate the accumulation of fatigue over a two-week offshore period. In particular, the effects of (1) time-of-day and days-on-shift as well as (2) acute and chronic sleep loss on the rate at which fatigue accumulates were investigated. Methods 42 day-shift offshore workers were examined. Fatigue was measured […]

Related Product: MotionWatch

Publication Date: March 20, 2019


Melatonin, temazepam and placebo in hospitalised older patients with sleeping problems (MATCH): a study protocol of randomised controlled trial

Hospitalised older patients frequently suffer from inadequate sleep, which can lead to patient distress and delayed recovery from acute illness or surgical procedure. Currently, no evidence-based treatments exist for sleeping problems in hospitalised older patients. Benzodiazepines, such as temazepam, are regularly prescribed by physicians, although they have serious side effects; for older patients in particular. […]

Related Product: MotionWatch

Publication Date: March 19, 2019


Sleep deprivation and its effects on communication during individual and collaborative tasks

Sleep loss has been shown to cause impairments in a number of aspects central for successful communication, ranging from poorer linguistic comprehension to alterations in speech prosody. However, the effect of sleep loss on actual communication is unknown. This study investigated how a night of sleep deprivation affected performance during multiple tasks designed to test […]

Related Product: MotionWatch

Publication Date: February 28, 2019


Sleep and cognitive function in chronic stroke: a comparative cross-sectional study

Poor sleep is common following stroke, limits stroke recovery, and can contribute to further cognitive decline post-stroke. However, it is unclear what aspects of sleep are different in older adults with stroke compared with those without, and whether the relationship between sleep and cognitive function differs by stroke history. We investigated whether older adults with […]

Related Product: MotionWatch

Publication Date: February 26, 2019


Brain and cognitive correlates of sleep fragmentation in elderly subjects with and without cognitive deficits

Introduction Sleep disturbances are increasingly recognized as a risk factor for Alzheimer’s disease. However, no study has assessed the relationships between objective sleep fragmentation (SF) and brain and cognitive integrity across different cognitive stages, from cognitively unimpaired elderly subjects to patients with subjective cognitive decline and/or mild cognitive impairment. Methods 30 cognitively unimpaired elderly participants […]

Related Product: MotionWatch

Publication Date: February 8, 2019


DREAMS-START (Dementia RElAted Manual for Sleep; STrAtegies for RelaTives) for people with dementia and sleep disturbances: a single-blind feasibility and acceptability randomized controlled trial.

40% of people with dementia have disturbed sleep but there are currently no known effective treatments. Studies of sleep hygiene and light therapy have not been powered to indicate feasibility and acceptability and have shown 40–50% retention. We tested the feasibility and acceptability of a six-session manualized evidence-based non-pharmacological therapy; Dementia RElAted Manual for Sleep; […]

Related Product: MotionWatch

Publication Date: January 1, 2019


Sleep-Wake and Sleep Stage Detection from Wrist-Worn Actigraphy

Please consult pdf

Related Product: MotionWatch

Publication Date: January 1, 2019


Aircraft noise exposure and objective sleep quality in the population living near airports in France

Background: Aircraft noise has been shown to have adverse effects on health and particularly on sleep. The aim of the study was to investigate the association between aircraft noise exposure and objective sleep quality in the population living near airports in France. Methods: Actimetric measurements were performed during eight nights to evaluate sleep quality of […]

Related Product: MotionWatch

Publication Date: December 18, 2018


Deep clinical and biological phenotyping of the preterm birth and small for gestational age syndromes: The INTERBIO-21 st Newborn Case-Control Study protocol

Background: INTERBIO-21 st is Phase II of the INTERGROWTH-21 st Project, the population-based, research initiative involving nearly 70,000 mothers and babies worldwide coordinated by Oxford University and performed by a multidisciplinary network of more than 400 healthcare professionals and scientists from 35 institutions in 21 countries worldwide. Phase I, conducted 2008-2015, consisted of nine complementary […]

Related Product: MotionWatch

Publication Date: December 10, 2018


Infant co-sleeping patterns and maternal sleep quality among Hadza hunter-gatherers

Objective Despite widespread interest in maternal–infant co-sleeping, few quantified data on sleep patterns outside of the cultural west exist. Here, we provide the first report on co-sleeping behavior and maternal sleep quality among habitually co-sleeping hunter-gatherers. Design Data were collected among the Hadza of Tanzania who live in domiciles constructed of grass huts with no […]

Related Product: MotionWatch

Publication Date: December 6, 2018


Impact of breast cancer on prospective memory functioning assessed by virtual reality and influence of sleep quality and hormonal therapy: PROSOM-K study

Breast cancer (BC) is the most frequent cancer in women with more than 70% of BC patients being treated with hormonal therapy (HT). Among these patients, some report difficulties in remembering what they are supposed to do at the right moment, referring to prospective memory (PM). PM is essential for autonomy and medical adherence of […]

Related Product: MotionWatch

Publication Date: September 30, 2018


Analysis of dynamic, bidirectional associations in older adult physical activity and sleep quality

Sleep quality and physical activity (PA) appear to be interrelated; thus, by promoting one behaviour, it may be possible to improve the other in older adults. Examination of the within‐person day‐to‐day variation in PA and sleep quality could potentially elucidate the directionality of the association of these behaviours. We measured sleep quality (i.e. fragmentation, efficiency, […]

Related Product: MotionWatch

Publication Date: September 9, 2018


Sleep disorders in early psychosis: incidence, severity, and association with clinical symptoms

Sleep disturbance is known to be associated with psychosis, but sleep disorders (eg, insomnia, nightmare disorder, sleep apnea) have rarely been investigated. We aimed to provide the first detailed assessment of sleep disorders and their correlates in patients with early psychosis. Sixty outpatients aged between 18 and 30 with nonaffective psychosis were assessed for sleep […]

Related Product: MotionWatch

Publication Date: September 8, 2018


Tailored exercise interventions to reduce fatigue in cancer survivors: study protocol of a randomized controlled trial

Cancer-related fatigue (CRF) is a common and distressing symptom of cancer and/or cancer treatment that persists for years after treatment completion in approximately one third of cancer survivors. Exercise is beneficial for the management of CRF, and general exercise guidelines for cancer survivors are available. There are multiple potential pathways by which exercise improves CRF, […]

Related Product: MotionWatch

Publication Date: July 24, 2018


Napping and toddlers’ memory for fast-mapped words

When toddlers hear a novel word, they quickly and independently link it with a novel object rather than known-name objects. However, they are less proficient in retaining multiple novel words. Sleep and even short naps can enhance declarative memory in adults and children and this study investigates the effect of napping on children’s memory for […]

Related Product: MotionWatch

Publication Date: July 5, 2018


Better Performance on the Psychomotor Vigilance Task Is Associated with Longer Sleep Duration and Lower Self-Reported Sleep Need in the Real World.

The psychomotor vigilance task (PVT) is sensitive measure of performance impairment arising from sleep loss and circadian misalignment. Some individuals are able to maintain stable, good performance during laboratory-imposed sleep restriction. It is unclear whether such individuals need less sleep or whether they are more resilient to the effects of sleep loss. We aimed to […]

Related Product: MotionWatch

Publication Date: June 2, 2018


The independent associations of physical activity and sleep with cognitive function in older adults

Background:Current evidence suggests physical activity (PA) and sleep are important for cognitive health; however, few studies examining the role of PA and sleep for cognitive health have measured these behaviors objectively. Objective:We cross-sectionally examined whether 1) higher PA is associated with better cognitive performance independently of sleep quality; 2) higher sleep quality is associated with […]

Related Product: MotionWatch

Publication Date: May 30, 2018


Bidirectional Relations between Stress and Sleep: An Intensive Daily Study

Cognitive functioning declines under sleep loss. Studies show 2.0 mA of transcranial direct current stimulation (tDCS) applied to the prefrontal cortex improves cognitive performance on a visuospatial threat detection task, and a similar montage rescues sleep-deprived performance decline. We sought to test whether 1.0 mA of tDCS is sufficient to improve threat detection performance under […]

Related Product: MotionWatch

Publication Date: April 27, 2018


The interaction between subclinical psychotic experiences, insomnia and objective measures of sleep

Investigations into schizophrenia have revealed a high incidence of comorbidity with disturbed sleep and circadian timing. Acknowledging this comorbidity on a dimensional level, we tested prospectively whether subclinical psychotic symptoms are more prevalent in individuals with insomnia. An insomnia group (n = 21) and controls (n = 22) were recruited on their subjective sleep quality, […]

Related Product: MotionWatch

Publication Date: March 1, 2018


Study protocol for Vitality: a proof-of-concept randomised controlled trial of exercise training or complex mental and social activities to promote cognition in adults with chronic stroke

Introduction Cerebrovascular disease—such as stroke—is the second most common cause of dementia (ie, vascular dementia). Specifically, a stroke increases one’s risk for dementia by a factor of two. Thus, stroke survivors represent a target population in need of intervention strategies to promote cognitive function and prevent dementia. The current standard of care in stroke rehabilitation […]

Related Product: MotionWatch

Publication Date: March 1, 2018


The cortisol awakening response predicts response inhibition in the afternoon of the same day

The cortisol awakening response (CAR) is the rapid increase of cortisol levels 30–45 min after awakening in the morning. Numerous studies have indicated the relationship between the CAR and cognition. However, little is known about daily variation in the CAR and cognitive function in healthy adults. The aim of the present study was to investigate whether […]

Related Product: MotionWatch

Publication Date: March 1, 2018


Quality of life, sleep and rheumatoid arthritis (QUASAR): a protocol for a prospective UK mHealth study to investigate the relationship between sleep and quality of life in adults with rheumatoid arthritis

People with rheumatoid arthritis (RA) frequently report reduced health-related quality of life (HRQoL), the impact one’s health has on physical, emotional and social well-being. There are likely numerous causes for poor HRQoL, but people with RA have identified sleep disturbances as a key contributor to their well-being. This study will identify sleep/wake rhythm-associated parameters that […]

Related Product: MotionWatch

Publication Date: January 8, 2018


Clinical considerations derived from the administration of melatonin to children with sleep disorders

Background and Objectives Despite the numerous investigations carried out in relation to melatonin, there is a lack of knowledge about the specific melatonin secretion patterns in the diverse primary sleep disturbances. The objective of this study was to analyze the plasma melatonin concentrations in children with primary sleep disorders and the effects of melatonin therapy […]

Related Product: MotionWatch

Publication Date: January 1, 2018


Sleep-wake functions and quality of life in patients with subthalamic deep brain stimulation for Parkinson’s disease

Objectives Sleep-wake disturbances (SWD) are frequent in Parkinson’s disease (PD). The effect of deep brain stimulation (DBS) on SWD is poorly known. In this study we examined the subjective and objective sleep-wake profile and the quality of life (QoL) of PD patients in the context of subthalamic DBS. Patients and methods We retrospectively analyzed data […]

Related Product: MotionWatch

Publication Date: December 18, 2017


Subject-specific multi-poroelastic model for exploring the risk factors associated with the early stages of Alzheimer’s disease

There is emerging evidence suggesting that Alzheimer’s disease is a vascular disorder, caused by impaired cerebral perfusion, which may be promoted by cardiovascular risk factors that are strongly influenced by lifestyle. In order to develop an understanding of the exact nature of such a hypothesis, a biomechanical understanding of the influence of lifestyle factors is […]

Related Product: MotionWatch

Publication Date: December 15, 2017


The evolution of human sleep: Technological and cultural innovation associated with sleep-wake regulation among Hadza hunter-gatherers

Sleep is necessary for the survival of all mammalian life. In humans, recent investigations have generated critical data on the relationship between sleep and ecology in small-scale societies. Here, we report the technological and social strategies used to alter sleep environments and influence sleep duration and quality among a population of hunter-gatherers, the Hadza of […]

Related Product: MotionWatch

Publication Date: December 13, 2017


Impact of sleep on attention in primary school-aged children with ASD in Singapore

Children with Autism Spectrum Disorder (ASD) have more sleep disturbances than typically developing (TD) children. Common sleep problems in ASD include difficulty in initiating sleep, maintaining sleep and shorter total sleep time. However, previous findings are largely based on Western countries (Australia, Finland, Sweden, United Kingdom and United States). Sleep problems have been associated with […]

Related Product: MotionWatch

Publication Date: December 1, 2017


Rest-activity circadian rhythm and sleep quality in patients with binge eating disorder

Recent findings suggest that altered rest-activity circadian rhythms (RARs) are associated with a compromised health status. RARs abnormalities have been observed also in several pathological conditions, such as cardiovascular, neurological, and cancer diseases. Binge eating disorder (BED) is the most common eating disorder, with a prevalence of 3.5% in women and 2% in men. BED […]

Related Product: MotionWatch

Publication Date: November 16, 2017


Sleep assessment by actigraphy in children with sleep disorders and attention deficit and / or hyperactivity disorder (ADHD)

Sleep disorders are one of the most frequent reasons for consultation in pediatrics, with a prevalence that ranges between 13-27% according to the different series consulted, referring to children aged between 4 and 12 years. On the other hand, its participation is well known as a comorbidity in children who are diagnosed, according to criteria […]

Related Product: MotionWatch

Publication Date: October 30, 2017


Poor sleep has negative implications for children with and without ADHD, but in different ways

Sleep problems are commonly reported in attention deficit hyperactivity disorder (ADHD), and are also a familiar characteristic of typical development (TD). We sought to elucidate the relationship between sleep, ADHD trait behaviors, and cognitive inattention, and how it manifests between ADHD and TD children. Participants: Eighteen children diagnosed with ADHD and 20 age-matched TD controls […]

Related Product: MotionWatch

Publication Date: October 26, 2017


Age-Related Nrem-Sleep Fragmentation: Relationships With Structural And Metabolic Brain Alterations, Amyloid Burden And Cognitive Performance

Background Sleep fragmentation (SF) increases with age, and is related to both cognitive impairment and increased risk of developing dementia. The mechanisms underlying these relationships are still unclear, but emerging evidence suggests that non-rapid eye movement (NREM) sleep may play a role in clearing β-amyloid (Aβ) from the brain. Thus, a disruption of NREM-sleep could […]

Related Product: MotionWatch

Publication Date: October 20, 2017


Analysis of different melatonin secretion patterns in children with sleep disorders: melatonin secretion patterns in children

The objective of this study was to analyze circadian patterns of urinary 6-sulphatoxymelatonin (aMT6s) excretion in children with primary sleep disorders in comparison with healthy controls. A total of 124 control children and 124 patients (aged 4-14 years) diagnosed with diverse primary sleep disorders were recruited. aMT6s concentrations were measured in diurnal and nocturnal urine, […]

Related Product: MotionWatch

Publication Date: September 15, 2017


Disrupting sleep: the effects of sleep loss on psychotic experiences tested in an experimental study with mediation analysis

Our view is that insomnia may be a causal factor in the occurrence of psychotic experiences such as paranoia and hallucinations. However, the causal relationship is not established. The aim of the study was to investigate the causal role of insomnia in psychotic experiences via a sleep restriction manipulation. The study was a within-subjects crossover […]

Related Product: MotionWatch

Publication Date: August 4, 2017


Sleep patterns in a randomized controlled trial of auricular acupuncture and cognitive behavioral therapy for insomnia

The aim of the study was to objectively examine how sleep patterns were affected in a short- and long-term perspective after auricular acupuncture (AA) and cognitive behavioral therapy for insomnia (CBT-i). Sixty participants with insomnia disorders (men/women 9/51; mean age of 60.5 years, (SD 9.4)), were randomized to group treatment with AA or CBT-i. Actigraphy […]

Related Product: MotionWatch

Publication Date: August 1, 2017


Evidence of disturbed sleep and mood state in well-trained athletes during short-term intensified training with and without a high carbohydrate nutritional intervention

Few studies have investigated the effects of exercise training on sleep physiology in well-trained athletes. We investigated changes in sleep markers, mood state and exercise performance in well-trained cyclists undergoing short-term intensified training and carbohydrate nutritional intervention. Thirteen highly-trained male cyclists (age: 25 ± 6y, O2max: 72 ± 5 ml/kg/min) participated in two 9-day periods […]

Related Product: MotionWatch

Publication Date: July 18, 2017


Chronotype variation drives night-time sentinel-like behaviour in hunter–gatherers

Sleep is essential for survival, yet it also represents a time of extreme vulnerability to predation, hostile conspecifics and environmental dangers. To reduce the risks of sleeping, the sentinel hypothesis proposes that group-living animals share the task of vigilance during sleep, with some individuals sleeping while others are awake. To investigate sentinel-like behaviour in sleeping […]

Related Product: MotionWatch

Publication Date: July 12, 2017


Feasibility of Home Monitoring to Track Activity Patterns in Older Adults

Physical activity and sleep are important outcomes in gerontological research, particularly where the researcher is interested in fear of falling among community-dwelling older adults. Self-report measures, however, have limited reliability and validity. Wearable devices are more accurate, but wearing over time may cause participant burden, thus, limiting the duration of monitoring. To explore a passive […]

Related Product: MotionWatch

Publication Date: June 30, 2017


The Role of Emotion Regulation in Sleep and Suicide – A Preliminary Analysis

Although the relationship between sleep problems and suicide has been well established, there has been little investigation as to why this association exists. Emotion regulation has been suggested as a possible mediator in this association (Littlewood et al., 2017), but it has not been formally tested. The current work sought to determine whether depleted emotion […]

Related Product: MotionWatch

Publication Date: June 1, 2017


The effect of sleep deprivation on cortical excitability–a neuromagnetic approach

Despite decades of study, no ironclad conclusion has been reached concerning the biological function of sleep in humans. Recent theories have proposed that sleep might play a role in maintaining cortical excitability at safe levels by downregulating excessive intersynaptic connections accumulated during a waking episode. In line with this theory, sleep deprivation has been shown […]

Related Product: MotionWatch

Publication Date: May 28, 2017


Sleep characteristics in child and adolescent offspring of parents with bipolar disorder: a case control study

Background Impairment of sleep and circadian rhythm is a typical feature of bipolar disorder (BD). We carried out an exploratory cross-sectional case-control study to extend the knowledge of sleep characteristics in offspring at risk for BD. Methods We investigated 42 offspring of bipolar parents (OB) (mean age 12.5 ± 3.2) and 42 sex and age […]

Related Product: MotionWatch

Publication Date: May 26, 2017


Sleep quality, clinical and psychological manifestations in women with systemic lupus erythematosus

Aim Sleep problems are a common complaint in systemic lupus erythematosus (SLE) patients. We analyzed sleep quality with subjective and objective measures in a sample with SLE and its possible relationships with the main manifestations of the disease. Methods Twenty‐one women with SLE and 20 healthy women participated in the study. All participants were evaluated […]

Related Product: MotionWatch

Publication Date: April 19, 2017


Predictors of nightly subjective-objective sleep discrepancy in poor sleepers over a seven-day period

This study sought to examine predictors of subjective/objective sleep discrepancy in poor sleepers. Forty-two individuals with insomnia symptoms (mean age = 36.2 years, 81% female) were recruited to take part in a prospective study which combined seven days of actigraphy with daily assessment of sleep perceptions, self-reported arousal, sleep effort, and mood upon awakening. A […]

Related Product: MotionWatch

Publication Date: March 9, 2017


Differences in sleep / wake patterns between elderly rural and urban populations in the Gironde

Goal Differences in sleep / wake patterns have been observed between rural and urban populations – in Brazil and India – with strong social and technological contrast (Carvalho 2014, Nag 2012). To our knowledge, there are no such studies on European populations. Methods The sleep / wake rhythm was recorded by actimetry (MotionWatch8) over 7 […]

Related Product: MotionWatch

Publication Date: February 27, 2017


Reliability of Actigraphy and Subjective Sleep Measurements in Adults: The Design of Sleep Assessments.

STUDY OBJECTIVES: The aim of the study was to investigate how many nights of measurement are needed for a reliable measure of sleep in a working population including adult women and men. METHODS: In all, 54 individuals participated in the study. Sleep was assessed for 7 consecutive nights using actigraphy as an objective measure, and […]

Related Product: MotionWatch

Publication Date: January 15, 2017


Alzheimer’s disease severity is not significantly associated with short sleep: survey by actigraphy on 208 mild and moderate Alzheimer’s disease patients

In epidemiological surveys, cognitive decline has been found to be associated with both short and long sleep duration.Our goal was to objectively determine how total sleep time (TST) at night was associated or not with apathy or severity scores in patients with Alzheimer ‘s disease (AD).During an observational first step of a clinical trial, sleep […]

Related Product: MotionWatch

Publication Date: January 1, 2017


What is segmented sleep? Actigraphy field validation for daytime sleep and nighttime wake

Objective To compare different scoring parameter settings in actigraphy software for inferring sleep and wake bouts for validating analytical techniques outside of laboratory environments. Design To identify parameter settings that best identify napping during periods of wakefulness, we analyzed 137 days on which participants reported daytime napping, as compared with a random subset of 30 […]

Related Product: MotionWatch

Publication Date: October 29, 2016


Mood Influences the Concordance of Subjective and Objective Measures of Sleep Duration in Older Adults

Objective/Background: Sleep plays a central role in maintaining health and cognition. In most epidemiologic studies, sleep is evaluated by self-report questionnaires but several reports suggest that these evaluations might be less accurate than objective measures such as polysomnography or actigraphy. Determinants of the discrepancy between objective and subjective measures remain to be investigated. The aim […]

Related Product: MotionWatch

Publication Date: July 26, 2016


Sleep/Wakefulness Rhythmicity and Brain White Matter Integrity In Aging Subjects

Sleep/wakefulness rhythmicity (Tranah et al., 2011) and sleep efficiency (Lim et al., 2013) have been linked to increased risk for dementia in elderly. However, to date little is known about modifications of circadian rhythms or sleep and age-related brain structure alterations of grey (GM) and white matter (WM). GM atrophy was assessed through Voxel Based […]

Related Product: MotionWatch

Publication Date: July 26, 2016


Subjective but not actigraphy-defined sleep predicts next-day fatigue in chronic fatigue syndrome: a prospective daily diary study

Study Objectives This study aimed to (1) examine the relationship between subjective and actigraphy-defined sleep, and next-day fatigue in chronic fatigue syndrome (CFS); and (2) investigate the potential mediating role of negative mood on this relationship. We also sought to examine the effect of presleep arousal on perceptions of sleep. Methods Twenty-seven adults meeting the […]

Related Product: PRO-Diary

Publication Date: April 1, 2016


The Sleep-E Study: An on-going cross-sectional study investigating associations of sleep quality and cardio-metabolic risk factors

Short sleep duration (⩽5–6 h/night) has been associated with an increased risk of weight gain (1,2) and non-communicable disease (3). Recently, through a systematic review and meta-analysis, we identified that short sleep duration may induce positive energy balance and have implications on weight gain over the long term (Al Khatib et al, unpublished data). Quality […]

Related Product: MotionWatch

Publication Date: January 22, 2016


Efficacy of cognitive behavioural therapy for sleep improvement in patients with persistent delusions and hallucinations (BEST): a prospective, assessor-blind, randomised controlled pilot trial.

Background Sleep disturbance occurs in most patients with delusions or hallucinations and should be treated as a clinical problem in its own right. However, cognitive behavioural therapy (CBT)—the best evidence-based treatment for insomnia—has not been tested in this patient population. We aimed to pilot procedures for a randomised trial testing CBT for sleep problems in […]

Related Product: MotionWatch

Publication Date: November 11, 2015


Genetics, sleep and memory: a recall-by-genotype study of ZNF804A variants and sleep neurophysiology

Schizophrenia is a complex, polygenic disorder for which over 100 genetic variants have been identified that correlate with diagnosis. However, the biological mechanisms underpinning the different symptom clusters remain undefined. The rs1344706 single nucleotide polymorphism within ZNF804A was among the first genetic variants found to be associated with schizophrenia. Previously, neuroimaging and cognitive studies have […]

Related Product: MotionWatch

Publication Date: October 24, 2015


Measuring sleep quality in older adults: a comparison using subjective and objective methods

Sleep quality decreases with aging and thus sleep complaints are prevalent in older adults, particularly for those with cognitive impairment and dementia. For older adults, emerging evidence suggests poor sleep quality increases risk of developing cognitive impairment and dementia. Given the aging population—and the impending economic burden associated with increasing numbers of dementia patients—there is […]

Related Product: MotionWatch

Publication Date: September 7, 2015


Increased Th17/Treg ratio in poststroke fatigue

Fatigue is a major debilitating symptom after stroke. The biological mechanisms underlying poststroke fatigue (PFS) are unknown. We hypothesized that PSF is associated with an alteration in the balance between Th17 and Treg cells. To test this hypothesis we assessed fatigue in 30 stroke survivors using the Fatigue Scale for Motor and Cognitive Functions (FSMC). […]

Related Product: MotionWatch

Publication Date: June 18, 2015


The Effects of Bright Light Intervention on Flight Crew Behavioral Alertness and Cognitive Fatigue

The study aimed to investigate the efficacy of bright light intervention to improve behavioral alertness and reduce cognitive fatigue in flight crew-members. During the four week study, crewmembers wore actigraph bands to monitor sleep behaviors. Self-assessed levels of sleepiness were recorded using the Karlosinska Sleepinees Scale (KSS), and self-assessed fatigue was measured using the Samn-Perelli […]

Related Product: MotionWatch

Publication Date: June 1, 2015


Short-term effects of electroconvulsive therapy on subjective and actigraphy-assessed sleep parameters in severely depressed inpatients

Background. Sleep disturbances are a key feature of major depression. Electroconvulsive treatment (ECT) may improve polysomnography-assessed sleep characteristics, but its short-term effects on actigraphy-assessed and subjective sleep characteristics are unknown. We therefore aimed to assess the effects of ECT on subjective and objective sleep parameters in a proof-of-principle study. Methods. We assessed subjective and objective […]

Related Product: MotionWatch

Publication Date: January 6, 2015


Page 1 of 2

UK & International customers

CamNtech Ltd.
Manor Farm
Fenstanton
Cambridgeshire
PE28 9JD, UK

US customers

CamNtech Inc.
630 Boerne Stage Airfield,
Boerne,
Texas 78006,
USA

Copyright

© 2020 CamNtech Ltd and CamNtech Inc

Company information

Registered in England No. 2221302
VAT No: GB486 3019 34

Company information

VAT No: GB486 3019 34

Privacy Policy