Explore: Physiological Aspects Of Sleep Positions

Sleep paralysis is a state, during waking up or falling asleep, in which a person is conscious but in a complete state of full-body paralysis. During

and non-REM sleep. Although REM stands for "rapid eye movement", this mode of sleep has many other aspects, including virtual paralysis of the body. Dreams

circadian rhythms. Among these physiological characteristics, the sleep–wake propensity can also be considered one of the daily rhythms regulated by the

phase is also known as paradoxical sleep (PS) and sometimes desynchronized sleep or dreamy sleep, because of physiological similarities to waking states including

not necessarily "sleep", although many of them have pronounced circadian rhythms.[citation needed] Sleep can follow a physiological or behavioral definition

last stage of NREM sleep. Parasomnias are sleep behaviors that affect the function, quality, or timing of sleep, caused by a physiological activation

psycho-social aspects, physical and psychological conditions and the presence of sleeping disorders can disrupt women's sleep. Research supports the presence of disturbed

shelter and sleep. Many of these physiological needs must be met for the human body to remain in homeostasis. Air, for example, is a physiological need; a

and mice. Physiology professor Nathaniel Kleitman's 1939 book Sleep and Wakefulness, revised 1963, summarized the existing knowledge of sleep and proposed

the physiological and psychological responses in preparation for sexual intercourse or when exposed to sexual stimuli. A number of physiological responses