Publications

CamNtech Research Library

CamNtech products have been trusted by specialist researchers for over 25 years.

Our research library contains peer reviewed publications citing the use of our devices.

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Found 201 Results

Theoretical construct into blocks of actigraphic-derived sleep parameters

Actigraphic parameters can provide indication of people’s sleep quality during their daily lives. However, there is a need for clear guidelines on the understanding of the different actigraphic parameters. The present study aims to propose a conceptual and theoretical framework for known actigraphic-derived parameters, which is able to describe the alternation between rest and wake […]

Related Product: MotionWatch

Publication Date: December 19, 2022


The effects of individual music therapy in nursing home residents with dementia to improve general well-being: study protocol of a randomized controlled trial

Background: Dementia is often associated with Neuropsychiatric Symptoms (NPS) such as agitation, depression, hallucinations, anxiety, that can cause distress for the resident with dementia in long-term care settings and can impose emotional burden on the environment. NPS are often treated with psychotropic drugs, which, however, frequently cause side effects. Alternatively, non-pharmacological treatments approaches can improve […]

Related Product: MotionWatch

Publication Date: December 16, 2022


The Relationship Between Sleep and Training in Elite Youth Team Athletes in Austria

This study investigates the sleep-wake behavior of elite youth team athletes in Austria concerning their training. For this purpose, 104 athletes (M = 14.52, SD = 0.40), who were each part of a U15/U16 soccer (n = 69) or ice hockey team (n = 35), were examined over 14 – 42 days using actigraphy and sleep protocol. […]

Related Product: MotionWatch

Publication Date: December 12, 2022


Inverse forgetting in unconscious episodic memory

Forming memories of experienced episodes calls upon the episodic memory system. Episodic encoding may proceed with and without awareness of episodes. While up to 60% of consciously encoded episodes are forgotten after 10 h, the fate of unconsciously encoded episodes is unknown. Here we track over 10 h, which are filled with sleep or daytime […]

Related Product: MotionWatch

Publication Date: November 29, 2022


Protocol for single case experimental design for yoga and sleep quality and inflammation: A two-hit model of sleep intervention

Background Poor sleep quality is a neglected clinical condition in the elderly that could predispose them to morbidities and even mortality. Several lines of clinical evidence support the potential of Meditative Movement Interventions (MMIs) in the alleviation of sleep-related disturbances in the elderly population. However, further studies are needed to provide more definitive evidence regarding […]

Related Product: MotionWatch

Publication Date: November 28, 2022


Sound reasons for unsound sleep: Comparative support for the sentinel hypothesis in industrial and nonindustrial groups

Background and objectives Sleep is a vulnerable state in which individuals are more susceptible to threat, which may have led to evolved mechanisms for increasing safety. The sentinel hypothesis proposes that brief awakenings during sleep may be a strategy for detecting and responding to environmental threats. Observations of sleep segmentation and group sentinelization in hunter-gatherer […]

Related Product: MotionWatch

Publication Date: November 22, 2022


Cross-country comparison of parental reports and objective measures of sleep patterns of typically developing children and autistic children between the UK and South Korea

Sleep duration and disturbances in typically developing (TD) children have been found to vary across countries. Given the impact of culture on sleep patterns in TD children, it is also necessary to examine the impact of culture on sleep patterns in children with atypical development. However, previous studies have often relied only on parent reports […]

Related Product: MotionWatch

Publication Date: November 14, 2022


Sleep and sleep hygiene of adolescents with and without ADHD during COVID-19

Restrictions related to the COVID-19 pandemic may have significantly impacted adolescents’ sleep, possibly even more so in adolescents with attention-deficit/hyperactivity disorder (ADHD). The current study examines the sleep of adolescents without ADHD (TD) and a homogeneous group of adolescents with ADHD and comorbid sleep problems using a multi-method objective and subjective assessment of sleep outcomes, […]

Related Product: MotionWatch

Publication Date: October 11, 2022


Experimental Sleep Deprivation Results in Diminished Perceptual Stability Independently of Psychosis Proneness

Psychotic disorders as well as psychosis proneness in the general population have been associated with perceptual instability, suggesting weakened predictive processing. Sleep disturbances play a prominent role in psychosis and schizophrenia, but it is unclear whether perceptual stability diminishes with sleep deprivation, and whether the effects of sleep deprivation differ as a function of psychosis […]

Related Product: MotionWatch

Publication Date: October 3, 2022


Genetic Engineering of Nonhuman Primate Models for Studying Neurodevelopmental Disorders

Neurodevelopmental disorders (NDDs), such as autism spectrum disorder (ASD), represent a group of highly prevalent, early onset conditions featured by neural and behavioral impairments with a strong genetic basis. Effective treatments for patients with ASD have yet to be developed due to the limited understanding of their pathophysiology and the lack of animal models that […]

Related Product: MotionWatch

Publication Date: September 30, 2022


Links between household and family social dynamics with sleep profiles among BaYaka foragers of the Congo Basin

Given the contributions of sleep to a range of health outcomes, there is substantial interest in ecological and environmental factors, including psychosocial contexts, that shape variation in sleep between individuals and populations. However, the links between social dynamics and sleep are not well-characterized beyond Euro-American settings, representing a gap in knowledge regarding the way that […]

Related Product: MotionWatch

Publication Date: September 9, 2022


Feasibility, usability and clinical value of intensive longitudinal diary assessments in older persons with cognitive impairment and depressive symptoms.

Objectives To evaluate the feasibility, usability and clinical value of daily diary assessments combined with actigraphy in older persons with cognitive impairment. Methods For 63 days, patients ≥60 years with cognitive impairments filled out a daily diary (including standardized questionnaires and cognitive test battery), and wore an actiwatch (sleep). After the study, participants and clinicians received personal […]

Related Product: MotionWatch

Publication Date: July 23, 2022


Impact of sleep on attention in primary school-aged autistic children: Exploratory cross-cultural comparison between Singapore and UK children

Background There is a growing body of research studying the impact sleep has on attention among typically developing (TD) children, but research is lacking among autistic children. Aims The present study aimed to explore, for the first time, differences in (1) attention, (2) sleep parameters among primary school-aged Singaporean autistic children (N = 26) and […]

Related Product: MotionWatch

Publication Date: June 24, 2022


Inconsistency between objective and subjective comparisons of sleep quality is found between sea level and moderate terrestrial altitude (2,320 m) in high-performance swimmers

It is popular for high-performance athletes to attend training camps at natural moderate altitude (1800–2500m), which may have direct and indirect effects on the quantity and quality of sleep athletes obtain. This can potentially influence the ability to maximise training responses and optimise recovery from exercise. This study aimed to compare objective and subjective markers […]

Related Product: MotionWatch

Publication Date: June 20, 2022


Factors Associated with Sleep Quality in Hospitalized Persons with Dementia

Background: Factors associated with sleep quality have not been well examined in hospitalized older persons with dementia, who are at high risk for impaired sleep. The aim was to identify factors associated with sleep quality among hospitalized persons with dementia. Methods: This secondary analysis used baseline data from a cluster randomized trial. Factors examined included […]

Related Product: MotionWatch

Publication Date: June 1, 2022


Evaluating Patterns and Factors Related to Sleep Disturbances in Prostate Cancer Patients

Prostate cancer patients may experience disturbed sleep as a result of their diagnosis or treatment. This study sought to evaluate disturbed sleep and excessive daytime sleepiness in newly diagnosed patients and those receiving androgen deprivation therapy (ADT). This study was conducted with 74 patients. Subjective data using the Pittsburgh Sleep Quality Index (PSQI) and Epworth […]

Related Product: MotionWatch

Publication Date: May 30, 2022


Associations among pre-sleep arousal, facets of emotion dysregulation, and sleep quality and efficiency during pregnancy

Introduction Pre-sleep arousal contributes to over 50% of pregnant people experiencing poor sleep quality and clinical insomnia. Given that poor sleep during pregnancy is associated with depression and suicide ideation, there is a critical need to identify intervention targets, such as difficulties with emotion regulation. However, emotion dysregulation is multifaceted and warrants further investigation in […]

Related Product: MotionWatch

Publication Date: May 25, 2022


Work schedule and seasonal influences on sleep and fatigue in helicopter and fixed-wing aircraft operations in extreme environments

Sleep and fatigue were investigated in aviation search and rescue, firefighting, emergency medical services and offshore transfer operations in 210 participants, for 21 days each, across 17 datasets in seven countries. Sleep data were collected using wrist-worn actigraphs and sleep diaries. Sustained attention was assessed using a 5-min Psychomotor Vigilance Task (PVT). Duty information was […]

Related Product: MotionWatch

Publication Date: May 18, 2022


The effect of sleep continuity disruption on multimodal emotion processing and regulation: a laboratory‐based, randomised, controlled experiment in good sleepers

Previous research shows that experimental sleep deprivation alters emotion processing, suggesting a potential mechanism linking sleep disruption to mental ill-health. Extending previous work, we experimentally disrupted sleep continuity in good sleepers and assessed next-day emotion processing and regulation using tasks with established sensitivity to depression. In a laboratory-based study, 51 good sleepers (37 female; mean […]

Related Product: MotionWatch

Publication Date: May 16, 2022


Night‐to‐night variation in sleep associates with day‐to‐day variation in vigilance, cognition, memory, and behavioral problems in Alzheimer’s disease

Introduction Sleep disturbances are commonly reported in people living with Alzheimer’s disease (AD), but it is currently unknown whether night-to-night variation in sleep predicts day-to-day variation in vigilance, cognition, mood, and behavior (daytime measures). Methods Subjective and objective sleep and daytime measures were collected daily for 2 weeks in 15 participants with mild AD, eight […]

Related Product: MotionWatch

Publication Date: May 16, 2022


Pediatric Appropriate Prolonged-Release Melatonin Minitablet for Insomnia in Children and Adolescents with Autism Spectrum Disorder

Despite high rates of comorbid insomnia among children and adolescents with Autism Spectrum Disorder (ASD), and its negative impact on child development, health and quality of life, there is limited awareness among clinicians of screening for, and treatment of, insomnia in this population. Prolonged-Release Melatonin (PedPRM, available commercially as Slenyto®) is the first authorized drug […]

Related Product: MotionWatch

Publication Date: May 2, 2022


Assessment of impact of stress on objectively and subjectively measured sleep quality in the working population

I N T R O D U C T I ON: Stress is ubiquitous and has a multidirectional impact on our health. One of the most visible problems caused by stress is sleep disturbance. The aim of the study was to evaluate the impact of subjectively assessed stress on objectively and subjectively measured sleep quality […]

Related Product: MotionWatch

Publication Date: May 1, 2022


Sleep behavior and chronotype before and throughout pregnancy

Study objective To compare sleep behavior before and during pregnancy. Methods In this prospective cohort study, healthy women were followed from pre-pregnancy until delivery. At pre-pregnancy and each trimester, participants completed validated questionnaires of chronotype and sleep quality and timing, including the Munich ChronoType Questionnaire, Epworth Sleepiness Scale, and Pittsburgh Sleep Quality Index. The primary […]

Related Product: MotionWatch

Publication Date: April 27, 2022


Sleep Disturbance and Quality of Life in Rheumatoid Arthritis: Prospective mHealth Study

Background: Sleep disturbances and poor health-related quality of life (HRQoL) are common in people with rheumatoid arthritis (RA). Sleep disturbances, such as less total sleep time, more waking periods after sleep onset, and higher levels of nonrestorative sleep, may be a driver of HRQoL. However, understanding whether these sleep disturbances reduce HRQoL has, to date, […]

Related Product: MotionWatch

Publication Date: April 22, 2022


On the Road to Camarón: The Sleep of an Ultra-Endurance Athlete Cycling 10,000 km in 24 Days

The impact of sleep on performance is fundamental for ultra-endurance athletes, but studies on this issue are rare. The current investigation examined the sleep and performance of a cyclist engaged in a simulated 10,000 km tour. The sleep behavior of the athlete (age, 57; height, 1.85 m; mass, 81 kg) before, during (i.e., 23 nights), […]

Related Product: MotionWatch

Publication Date: April 9, 2022


Neural spatio-temporal patterns of information processing related to cognitive conflict and correct or false recognitions

Using a visual short-term memory task and employing a new methodological approach, we analyzed neural responses from the perspective of the conflict level and correctness/erroneous over a longer time window. Sixty-five participants performed the short-term memory task in the fMRI scanner. We explore neural spatio-temporal patterns of information processing in the context of correct or […]

Related Product: MotionWatch

Publication Date: March 28, 2022


Effects of experimental sleep restriction on energy intake, energy expenditure, and visceral obesity

Background Although the consequences of sleep deficiency for obesity risk are increasingly apparent, experimental evidence is limited and there are no studies on body fat distribution. Objectives The purpose of this study was to investigate the effects of experimentally-induced sleep curtailment in the setting of free access to food on energy intake, energy expenditure, and […]

Related Product: MotionWatch

Publication Date: March 28, 2022


Timely sleep coupling: spindle-slow wave synchrony is linked to early amyloid-β burden and predicts memory decline

Sleep alteration is a hallmark of ageing and emerges as a risk factor for Alzheimer’s disease (AD). While the fine-tuned coalescence of sleep microstructure elements may influence age-related cognitive trajectories, its association with AD processes is not fully established. Here, we investigated whether the coupling of spindles and slow waves is associated with early amyloid-beta […]

Related Product: MotionWatch

Publication Date: March 19, 2022


Exploring the relationship of sleep, cognition, and cortisol in sickle cell disease

Background Neurocognitive impairment is common in people with Sickle Cell Disease (SCD) and evidence is accumulating that sleep disturbances play a role. The interaction between cortisol and sleep in the general population is associated with cognition as well as general wellbeing but there are few data in SCD. We aimed to understand the relationship between […]

Related Product: MotionWatch

Publication Date: March 12, 2022


Time-of-day matters-pronounced regional morning-to-evening effects in structural brain metrics

In recent decades magnetic resonance imaging (MRI) has established itself as the golden standard for studying human brain structure in health and disease. As a result, it has become increasingly more important to identify factors that may influence study outcomes and contribute to misleading conclusions. With the regional time-of-day (TOD) differences in structural brain metrics […]

Related Product: MotionWatch

Publication Date: March 7, 2022


The Effect of Rugby Union Match Play on Sleep Patterns and Subsequent Impact on Postmatch Fatigue Responses

Purpose: Sleep is recognized as an important recovery strategy, yet little is known regarding its impact on postmatch fatigue. The aims of this study were to (1) describe sleep and postmatch fatigue, (2) understand how sleep is affected by contextual and match factors, and (3) assess how changes in sleep can affect postmatch fatigue. Methods: […]

Related Product: MotionWatch

Publication Date: March 1, 2022


Detailed Clinical and Functional Studies of New MTOR Variants in Smith-Kingsmore Syndrome Reveal Deficits of Circadian and Sleep Homeostasis

Heterozygous de novo or inherited gain-of-function mutations in the MTOR gene cause Smith-Kingsmore Syndrome (SKS). SKS is a rare autosomal dominant condition, and individuals with SKS display macrocephaly/megalencephaly, developmental delay, intellectual disability, and seizures. A few dozen individuals are reported in the literature. Here, we report a cohort of 28 individuals with SKS that represent […]

Related Product: MotionWatch

Publication Date: February 21, 2022


Slow oscillation–spindle coupling strength predicts real-life gross-motor learning in adolescents and adults

Previously, we demonstrated that precise temporal coordination between slow oscillations (SOs) and sleep spindles indexes declarative memory network development (Hahn et al., 2020). However, it is unclear whether these findings in the declarative memory domain also apply in the motor memory domain. Here, we compared adolescents and adults learning juggling, a real-life gross-motor task. Juggling […]

Related Product: MotionWatch

Publication Date: February 21, 2022


Multispecies probiotic administration reduces emotional salience and improves mood in subjects with moderate depression: a randomised, double-blind, placebo-controlled study

Background The potential antidepressant properties of probiotics have been suggested, but their influence on the emotional processes that may underlie this effect is unclear. Methods Depressed volunteers (n = 71) were recruited into a randomised double-blind, placebo-controlled study to explore the effects of a daily, 4-week intake of a multispecies probiotic or placebo on emotional […]

Related Product: MotionWatch

Publication Date: February 7, 2022


Effects of a hybrid digital Cognitive Behavioural Therapy for Insomnia and Emotion Regulation in the workplace

Introduction: This trial tests the efficacy of implementing a hybrid digital cognitive behavioural therapy for insomnia (dCBT-I) and emotion regulation (ER) in the workplace. The study protocol follows on the SPIRIT (Standard Protocol Items for Randomized Trials) 2013 recommendations. Methods and analysis: Mixed methods evaluation with a two-arm randomised waitlist control design of a six […]

Related Product: MotionWatch

Publication Date: February 4, 2022


Sleep moderates the effects of Tibetan yoga for women with breast cancer undergoing chemotherapy

This study examined self-reported and actigraphy-assessed sleep and depression as moderators of the effect of a Tibetan yoga intervention on sleep and depression among women undergoing chemotherapy for breast cancer. This is a secondary analysis of an RCT examining a 4-session Tibetan yoga program (TYP; n = 74) versus stretching program (STP; n = 68) or usual care (UC; […]

Related Product: MotionWatch

Publication Date: February 2, 2022


Boosting Recovery During Sleep by Means of Auditory Stimulation

Sufficient recovery during sleep is the basis of physical and psychological well-being. Understanding the physiological mechanisms underlying this restorative function is essential for developing novel approaches to promote recovery during sleep. Phase-targeted auditory stimulation (PTAS) is an increasingly popular technique for boosting the key electrophysiological marker of recovery during sleep, slow-wave activity (SWA, 1–4 Hz […]

Related Product: MotionWatch

Publication Date: February 2, 2022


Order matters: sleep spindles contribute to memory consolidation only when followed by rapid-eye-movement sleep

Sleep is known to benefit memory consolidation, but little is known about the contribution of sleep stages within the sleep cycle. The sequential hypothesis proposes that memories are first replayed during nonrapid-eye-movement (NREM or N) sleep and then integrated into existing networks during rapid-eye-movement (REM or R) sleep, two successive critical steps for memory consolidation. […]

Related Product: MotionWatch

Publication Date: January 17, 2022


SLEEP: intervention with weighted blankets for children with attention deficit hyperactivity disorder (ADHD) and sleep problems: study protocol for a randomised control trial

Introduction and objectives Children with attention deficit hyperactivity disorder (ADHD) have an increased risk of sleep problems. Weighted blankets are one possible non-pharmacological intervention for these problems in this group of children. However, the effectiveness of weighted blankets is insufficiently investigated. This study aims to investigate the effectiveness of weighted blankets in terms of sleep, […]

Related Product: MotionWatch

Publication Date: January 4, 2022


The impact of sleep restriction on skin parameters and facial appearance of 24 women

Background Total sleep deprivation has a visible impact on subjective facial appearance. However, there is a lack of knowledge on how moderate sleep restriction objectively impairs skin quality and facial aspect. Methods Twenty-four healthy good-sleeping women, aged 30-50, volunteered for this study on the impact of sleep restriction (SR) on their facial skin. SR was […]

Related Product: MotionWatch

Publication Date: December 8, 2021


Relationships between quality of sleep and cerebral amyloid load in the elderly

Goal Alzheimer’s disease is characterized by an accumulation of amyloid β proteins (pAβ) in the brain. Recent studies indicate that brain protein extrusion is a physiological phenomenon that takes place during deep sleep phases. The relationship between the accumulation of pAβ and the quality of sleep in the elderly is still poorly understood. Our study […]

Related Product: MotionWatch

Publication Date: December 7, 2021


Using Actigraphy and Heart Rate Variability (HRV) to Assess Sleep Quality and Sleep Arousal of Three App-Based Interventions: Sleep Music, Sleepcasts, and Guided Mindfulness

Reduced sleep quality is pronounced among the majority of the US population and is associated with decreased quality of life. The development of solutions that can aid in improving sleep quality is therefore imperative. This study examined the impact of 3 app-based interventions on physiological regulation of sleep arousal, sleep quality, and cognitive functioning using […]

Related Product: MotionWatch

Publication Date: November 30, 2021


A direct comparison of wrist actigraphy and sleep diaries in measuring sleep in healthy adults

Measuring sleep and sleep quality is an important diagnostic and monitoring tool, and a number of different methods for measurement have been developed over the last half-century. Two prevalent methods include wrist actigraphy and sleep diaries. Both methods can be applied in different circumstances, but both have strengths and weaknesses. This study aimed to identify […]

Related Product: MotionWatch

Publication Date: November 19, 2021


Do Mothers Have Worse Sleep Than Fathers? Sleep Imbalance, Parental Stress, and Relationship Satisfaction in Working Parents

Purpose Previous research indicates that mothers take a larger responsibility for child care during the night and that they have more disturbed sleep than fathers. The purpose of this study was to determine whether such a sleep imbalance exists in working parents of young children, and the extent to which it depends on the way […]

Related Product: MotionWatch

Publication Date: November 2, 2021


Chronotype as self-regulation: morning preference is associated with better working memory strategy independent of sleep

Study objectives We set out to examine how chronotype (diurnal preference) is connected to ability to function in natural conditions where individuals cannot choose their sleep schedule. We conducted a cross-sectional study in military conscript service to test the hypothesis that sleep deprivation mediates the adverse effects of chronotype on cognitive functioning. We also examined […]

Related Product: MotionWatch

Publication Date: October 18, 2021


Do self‐ratings of the Pittsburgh Sleep Quality Index reflect actigraphy recordings of sleep quality or variability? An exploratory study of bipolar disorders versus healthy controls

Sleep disturbances are typical symptoms of acute episodes of bipolar disorder (BD) and differentiate euthymic BD cases from healthy controls (HC). Researchers often employ objective recordings to evaluate sleep patterns, such as actigraphy, whilst clinicians often use subjective ratings, such as the Pittsburgh Sleep Quality Index (PSQI). As evidence suggests the measures may disagree, we […]

Related Product: MotionWatch

Publication Date: October 18, 2021


Prior Exposure and Toddlers’ Sleep-Related Memory for Novel Words

Children can easily link a novel word to a novel, unnamed object—something referred to as fast mapping. Despite the ease and speed with which children do this, their memories for novel fast-mapped words can be poor unless they receive memory supports such as further exposure to the words or sleep. Axelsson, Swinton, Winiger, and Horst […]

Related Product: MotionWatch

Publication Date: October 18, 2021


Chromatic Pupillometry in Isolated Rapid Eye Movement Sleep Behavior Disorder

Background Melanopsin retinal ganglion cell (mRGC)-mediated pupillary light reflex (PLR) abnormalities have been documented in several neurodegenerative disorders including Parkinson’s disease. Overall, isolated rapid eye movement (REM) sleep behavior disorder (iRBD) represents the strongest prodromal risk factor for impending α-synucleinopathies. Objectives To quantitatively compare PLR and mRGC-mediated contribution to PLR in 16 iRBD patients and […]

Related Product: MotionWatch

Publication Date: October 7, 2021


Sleep assessment in patients with Cluster headache – self reported vs observed data

Objective: Cluster Headache (CH) is a primary headache disorder often characterized by a circadian timing of headache attacks. The hypothalamus is reported to be activated during attacks, and several genes involved in the regulation of the molecular clock have been linked to CH. To investigate this further, we analyzed sleep patterns in CH patients compared […]

Related Product: MotionWatch

Publication Date: September 8, 2021


Sleep extension and metabolic health in male overweight/obese short sleepers: A randomised controlled trial

While limited evidence suggests that longer sleep durations can improve metabolic health in habitual short sleepers, there is no consensus on how sustained sleep extension can be achieved. A total of 18 men (mean [SD] age 41 [ 9] years), who were overweight/obese (mean [SD] body mass index 30 [3] kg/m2) and short sleepers at […]

Related Product: MotionWatch

Publication Date: August 20, 2021


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