melatonin Archives

How Smart Is It to Go to Bed with the Phone? The Impact of Short-Wavelength Light and Affective States on Sleep and Circadian Rhythms

by Admin1 | Oct 28, 2021

Previously, we presented our preliminary results (N = 14) investigating the effects of short-wavelength light from a smartphone during the evening on sleep and circadian rhythms (Höhn et al., 2021). Here, we now demonstrate our full sample (N = 33 men), where...

Effects of 2-hour nighttime nap on melatonin concentration and alertness during 12-hour simulated night work

by Admin1 | Sep 27, 2021

A nighttime nap is expected to mitigate melatonin suppression during night work by blocking light input to the retina, but it is unclear. In the present study, we investigated the effects of a nap break on melatonin level, subjective sleepiness, and vigilance...

Sleep deprivation therapy to reset the circadian pacemaker in a non-24-hour sleep-wake disorder: a case report

by Admin1 | Apr 1, 2021

Non-24-hour sleep-wake disorder (N24SWD) is one of several chronic circadian rhythm sleep-wake disorders (CRSWDs). It is defined as progressive daily shifts in sleep onset and wake times. It mainly affects sight-impaired persons, is relatively rare in sighted...

Weekly, seasonal and chronotype‐dependent variation of Dim‐Light Melatonin Onset

by Admin1 | Feb 20, 2021

In humans, the most important zeitgeber for entrainment is light. Laboratory studies have shown that meaningful changes in light exposure lead to phase shifts in markers of the circadian clock. In natural settings, light is a complex signal varying with external...

Preliminary Results: The Impact of Smartphone Use and Short-Wavelength Light during the Evening on Circadian Rhythm, Sleep and Alertness

by Admin1 | Jan 22, 2021

Smartphone usage strongly increased in the last decade, especially before bedtime. There is growing evidence that short-wavelength light affects hormonal secretion, thermoregulation, sleep and alertness. Whether blue light filters can attenuate these negative effects...

« Older Entries

How Smart Is It to Go to Bed with the Phone? The Impact of Short-Wavelength Light and Affective States on Sleep and Circadian Rhythms

Effects of 2-hour nighttime nap on melatonin concentration and alertness during 12-hour simulated night work

Sleep deprivation therapy to reset the circadian pacemaker in a non-24-hour sleep-wake disorder: a case report

Weekly, seasonal and chronotype‐dependent variation of Dim‐Light Melatonin Onset

Preliminary Results: The Impact of Smartphone Use and Short-Wavelength Light during the Evening on Circadian Rhythm, Sleep and Alertness

Search News

Recent Posts

News Archive

Get A Free Quote

UK & International customers

Phone

Email

US customers

Phone

Email

Copyright

Company information

How Smart Is It to Go to Bed with the Phone? The Impact of Short-Wavelength Light and Affective States on Sleep and Circadian Rhythms

Effects of 2-hour nighttime nap on melatonin concentration and alertness during 12-hour simulated night work

Sleep deprivation therapy to reset the circadian pacemaker in a non-24-hour sleep-wake disorder: a case report

Weekly, seasonal and chronotype‐dependent variation of Dim‐Light Melatonin Onset

Preliminary Results: The Impact of Smartphone Use and Short-Wavelength Light during the Evening on Circadian Rhythm, Sleep and Alertness

Search News

Recent Posts

News Archive

Request a Quote

Get A Free Quote

UK & International customers

Phone

Email

US customers

Phone

Email

Copyright

Company information