Definition of sleep

Sleep is defined by a combination of behavioral and physiological characteristics. Behaviorally, sleeping humans tend to lie still in stereotypical postures. This condition, which is characterized by a markedly reduced awareness of the outside world, is different, however, from other unconscious states like coma or anesthesia because of its prompt reversibility [10]. Using electrophysiological criteria, human sleep can be divided into two types, REM and NREM sleep. During REM sleep, bursts of eye movement activity frequently occur. REM sleep is also called paradoxical sleep because of EEG activity similar to that observed during wakefulness. On the other hand, during NREM sleep, which is also described as orthodox sleep, the EEG shows low-frequency activity.

Healthy Sleep

Healthy Sleep

A Guide to Natural Sleep Remedies. Many of us experience the occasional night of sleeplessness without any consequences. It is when the occasional night here and there becomes a pattern of several nights in arow that you are faced with a sleeping problem. Repeated loss of sleep affects all areas of your life The physical, the mental, and theemotional. Sleep deprivation can affect your overall daily performance and may even havean effecton your personality.

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