Physiology of Sleep and Clinical Characteristics by Miranda Nava Gabriel in Online Journal of Neurology and Brain Disorders in Lupine Publishers
Sleep is defined as a natural decrease in the perception [1] of
the external environment that occurs periodically and reversibly,
but retaining a certain degree of reactivity towards the environment
and autonomous functions [2]. Sleep is considered an active process
of biological, cyclical and, it is essential for survival. Most adults
require an amount of sleep between 7-8 hours per day; however,
there are individual variations regarding the schedule, duration,
and internal structure of the dream [3].
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