Sleep-wake rhythms; Wake-sleep cycle
The rhythmic alternation between two behavioral states: sleep and wakefulness. The rhythmic regulation of the alternation between these two states usually refers to rhythms with a circadian period.
Sleep and the Sleep-Wake Cycle
The defining behavioral characteristics of sleep that are used to identify sleep in many animals are: (i) a species-specific posture; (ii) reduced responsiveness to external stimuli; (iii) rebound after deprivation see .
The assessment of a species-specific posture requires around-the-clock behavioral observations. In most species, sleep will be accompanied by behavioral quiescence. In some species, such as dolphins, sleep verified by electrophysiological recordings has been observed while the animal is behaving.
Variation in responsiveness across putative sleep and wake states can be assessed by quantification of arousal thresholds for standardized tactile, auditory, or other stimuli....
- 3.Borbély AA, Dijk DJ, Achermann P, Tobler I (2001) Processes underlying the regulation of the sleep-wake cycle. In: Takahashi JS, Turek FW, Moore RY (eds) Circadian clocks. Kluwer Academic/Plenum Publishers, New York, pp 457–479Google Scholar
- 6.Czeisler CA, Dijk DJ (2001) Human circadian physiology and sleep-wake regulation. In: Takahashi JS, Turek FW, Moore RY (eds) Circadian clocks. Kluwer Academic/Plenum Publishers, New York, pp 531–569Google Scholar
- 8.Dijk DJ, Franken P (2005) Interaction of sleep homeostasis and circadian rhythmcity: dependent or independent systems. In: Kryger MH, Roth T, Dement WC (eds) Principles and practice of sleep medicine. Elseviers Saunders, Philadelphia, pp 418–434Google Scholar