TL;DRAbstract
Human life can be divided into three specific stages of consciousness: wake, non-REM (rapid eye movement) sleep, and REM sleep (Table 11.1). The quality of life during the wakeful stage is heavily dependent on the quality of REM and non-REM sleep experienced, whether during childhood, adolescence, or adulthood. The most restorative sleep is delta sleep (slow wave sleep or deep sleep) that occurs in Stages 3 and 4 of non-REM sleep; it is during these stages that one is the most difficult to waken. Individuals waken during REM sleep, but the state of being awake is normally so brief that it is not recalled later when in the true wake state. Rapid eye movement and generalized muscle atonia are characteristic of REM sleep; diaphragmatic movements and erections are the only muscle movements not inhibited.
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Human life can be divided into three specific stages of consciousness: wake, non-REM (rapid eye movement) sleep, and REM sleep (Table 11.1). The quality of life during the wakeful stage is heavily dependent on the quality of REM and non-REM sleep experienced, whether during childhood, adolescence, or adulthood. The most restorative sleep is delta sleep (slow wave sleep or deep sleep) that occurs in Stages 3 and 4 of non-REM sleep; it is during these stages that one is the most difficult to waken. Individuals waken during REM sleep, but the state of being awake is normally so brief that it is not recalled later when in the true wake state. Rapid eye movement and generalized muscle atonia are characteristic of REM sleep; diaphragmatic movements and erections are the only muscle movements not inhibited.
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