Much of the current science on, and mathematical modeling of, dynamic changes in human
performance within and between days is dominated by the two-process model of sleep …

Humans show large inter-individual differences in organising their behaviour within the 24-h
day—this is most obvious in their preferred timing of sleep and wakefulness. Sleep and …

Patterns of daily human activity are controlled by an intrinsic circadian clock that promotes∼
24 hr rhythms in many behavioral and physiological processes. This system is altered in …

Chronic sleep deficiency, defined as a state of inadequate or mistimed sleep, is a growing
and underappreciated determinant of health status. Sleep deprivation contributes to a …

Human behavior shows large interindividual variation in temporal organization. Extreme
“larks” wake up when extreme “owls” fall asleep. These chronotypes are attributed to …

Mental fatigue is a contributing factor to some serious transportation crashes. In this study,
we measured mental fatigue in drivers using electroencephalogram (EEG) and …

Abstract Study Objectives: Chronotype, or diurnal preference, refers to behavioral
manifestations of the endogenous circadian system that governs preferred timing of sleep …

Background Short sleep duration and decreased sleep quality are emerging risk factors for
obesity and its associated morbidities. Chronotype, an attribute that reflects individual …

Chronotype can be defined as an expression or proxy for circadian rhythms of varied
mechanisms, for example in body temperature, cortisol secretion, cognitive functions, eating …

Humans are an excellent model system for studying entrainment of the circadian clock in the
real world. Unlike the situation in laboratory experiments, entrainment under natural …