The daily alternation between sleep and wakefulness is one of the most dominant features
of our lives and is a manifestation of the intrinsic 24 h rhythmicity underlying almost every …

Sleep is an essential component of overall human health but is so tightly regulated that
when disrupted can cause or worsen certain ailments. An important part of this process is …

Two adolescent mental health fields—sleep and depression—have advanced largely in
parallel until about four years ago. Although sleep problems have been thought to be a …

Highlights•Most studies measure morningness/eveningness preference rather than
'chronotype'.•Few longitudinal studies exist, and show contrasting results for the direction of …

The temporal organization of molecular and physiological processes is driven by
environmental and behavioral cycles as well as by self-sustained molecular circadian …

Light is a potent circadian entraining agent. For many people, daily light exposure is
fundamentally dysregulated with reduced light during the day and increased light into the …

Circadian clocks drive cyclic variations in many aspects of physiology, but some daily
variations are evoked by periodic changes in the environment or sleep–wake state and …

Abstract Study Objectives This study will (1) estimate the nightly sleep need of human
adolescents,(2) determine the time course and severity of sleep-related deficits when sleep …

Disturbances of the sleep-wake cycle are highly prevalent and diverse. The aetiology of
some sleep disorders, such as circadian rhythm sleep-wake disorders, is understood at the …

Delayed sleep–wake phase disorder (DSWPD) is a sleep disorder in which the habitual
sleep–wake timing is delayed, resulting in difficulty in falling asleep and waking up at the …