EnglishMany people think that sleep is a passive and unchanging process. In fact, the physical body rests during sleep, but the brain remains active. There are two basic states of sleep, rapid eye movement (REM) sleep and non-rapid eye movement (NREM) sleep, which the brain organizes in a regular and…
MoreDrowsiness is a state of near-sleep, a strong desire for sleep, or sleeping for unusually long periods. Drowsy people tend to fall asleep in inappropriate situations or at inappropriate times, which affects their family, social life and job performance. Excessive daytime drowsiness may suggest the presence of a sleep disorder;…
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