During sleep, our biological clock prepares us for the forthcoming period of activity by
controlling the release of hormones and the activity of the autonomic nervous system. Here …

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 …

The brain has a complex structure composed of hundreds of regions, forming networks to
cooperate body functions. Therefore, understanding how various brain regions …

The classic view of circadian timing in mammals emphasizes a light-responsive 'master
clock'within the hypothalamus which imparts temporal information to the organism. Recent …

Daily rhythmicity, including timing of wakefulness and hormone secretion, is mainly
controlled by a master clock located in the suprachiasmatic nucleus (SCN) of the …

The highly coordinated output of the hypothalamic biological clock does not only govern the
daily rhythm in sleep/wake (or feeding/fasting) behaviour but also has direct control over …

Circadian rhythm disturbances are a common symptom among individuals with mood
disorders. The suprachiasmatic nucleus (SCN), in the ventral part of the anterior …

10.1152/japplphysiol. 00836.2001.—Many daily biological rhythms are governed by an
innate timekeeping mechanism or clock. Endogenous, temperature-compensated circadian …

Virtually all cells in the body have an intracellular clockwork based on a negative feedback
mechanism. The circadian timekeeping system in mammals is a hierarchical multi-oscillator …

Circadian rhythms in mammals are regulated by a system of endogenous circadian
oscillators (clock cells) in the brain and in most peripheral organs and tissues. One group of …