Humans live in a 24-hour environment, in which light and darkness follow a diurnal pattern.
Our circadian pacemaker, the suprachiasmatic nuclei (SCN) in the hypothalamus, is …

Shift work comprises work schedules that extend beyond the typical “nine-to-five” workday,
wherein schedules often comprise early work start, compressed work weeks with 12-hour …

In the last three decades the two‐process model of sleep regulation has served as a major
conceptual framework in sleep research. It has been applied widely in studies on fatigue …

Later chronotype (ie evening preference) and later timing of sleep have been associated
with greater morbidity, including higher rates of metabolic dysfunction and cardiovascular …

Circadian rhythms are near 24-h patterns of physiology and behaviour that are present
independent of external cues including hormones, body temperature, mood, and sleep …

We identified individual-level diurnal and seasonal mood rhythms in cultures across the
globe, using data from millions of public Twitter messages. We found that individuals …

The objective of this review was to examine the evidence for the link between fatigue and
safety, especially in transport and occupational settings. For the purposes of this review …

A common feature of aging is the advance of the timing of sleep to earlier hours, 1–7 often
earlier than desired. 8–10 The sleep of older people is also characterized by an increased …

Due to the clinical and etiological heterogeneity of major depressive disorder, it has been
difficult to elucidate its pathophysiology. Current neurobiological theories with the most valid …

Disturbances of sleep are typical for most depressed patients and belong to the core
symptoms of the disorder. Since the 1960s polysomnographic sleep research has …