Introduction: There are few studies evaluating the characteristics of the sleep-wake cycle (SWC) patterns in the general population. The aims of this study was to evaluate the SWC in a sample of the São Paulo city population; ...

Shiftwork-induced sleep deprivation and circadian disruption probably leads to an increase in the production of cytokines and dysregulation of innate immune system, respectively. This project aims evaluating changes in ...

Before the availability of artificial light, moonlight was the only source of light sufficient to stimulate nighttime activity; still, evidence for the modulation of sleep timing by lunar phases is controversial. Here, we ...

The sleep onset and offset delay at adolescence in relation to childhood. Besides biological causes, some external factors as academic obligations and socialization contributes, increasing the burden of school ...

Introduction: Aging is one of the phenomena that affect the regulation of the sleep-wake cycle (SWC) and its components, the circadian and homeostatic. Disorders in the SWC regulation are related to an important health ...

Psychosocial, behavioral and physiological changes related to adolescence contribute to a phase delay in the sleep-wake cycle (SWC). However, early school starting time in the morning shorten sleep, causing partial chronic ...

Dim light melatonin onset (DLMO) is the most reliable measure of human central circadian timing. Its modulation by light exposure and chronotype has been scarcely approached. We evaluated the impact of light changes on the ...