| Popis: |
The placement and duration of sleep within the nychthemeron is under the control of (1) homeostasis, (2) circadian rhythms, (3) individual demands and habits, and (4) environmental conditions. The first two factors are the basis for the two-process model of sleep (Borbely, 1982). Factor 3 was added by Webb (1988) as an essential behavioral component. Both this third factor and the fourth one are optional factors for sleep-wake regulation. According to the relative strength of each single factor and to their specific combination, very different temporal distributions of sleeping and waking can result. |
