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 …

Melatonin, the neurohormone of the pineal gland, is also produced by various other tissues
and cells. It acts via G protein-coupled receptors expressed in various areas of the central …

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 …

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

For many years, researchers have suggested that abnormalities in circadian rhythms may
underlie the development of mood disorders such as bipolar disorder (BPD), major …

Circadian rhythms, among other factors, have been shown to regulate key physiological
processes involved in athletic performance [1–7]. Personal best performance of athletes in …

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 …

Circadian timekee** allows appropriate temporal regulation of an organism's internal
metabolism to anticipate and respond to recurrent daily changes in the environment …

Circadian rhythms are ubiquitous in all living organisms, and nearly all physiologic
functions, most notably sleep and wake cycles, exhibit circadian rhythmicity. Circadian …