The interest in the systematic study of the circadian typology (CT) is relatively recent and has
developed rapidly in the two last decades. All the existing data suggest that this individual …

Mammalian circadian rhythms are controlled by endogenous biological oscillators, including
a master clock located in the hypothalamic suprachiasmatic nuclei (SCN). Since the period …

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

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 …

Circadian cycles affect a variety of physiological processes, and disruptions of normal
circadian biology therefore have the potential to influence a range of disease-related …

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 …

Background: Of all the psychiatric disorders associated with insomnia, depression is the
most common. It has been estimated that 90% of patients with depression complain about …

Circadian rhythms are daily cycles of physiology and behaviour that are driven by an
endogenous oscillator with a period of approximately (circa-) one day (diem). Exemplified in …

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

With increasing economic and social demands, we are rapidly evolving into a 24-h society.
In any urban economy, about 20% of the population are required to work outside the regular …