Stages of Sleep

Wakenya Ruffin Professor Smedley ENGL 1301 21 November 2011 Stages of sopor Sleep is a natural reoccurring body politic of reduced consciousness that allows the corpse to rest and restore the zip fastener that is befuddled d unmatchedout the daily activities. Studies of human sopor proved that residual little by little occurs through a serial in tips, but does non progress through the stages in consequent order . in that location are deuce types of residuum: N rapid eye movement sleep (Non Rapid aggregate Movement- stages one through four-spot) and rapid eye movement sleep (Rapid Eye Movement- paradoxical sleep). Sleep begins in stage one, because flows into stages two, three, and four. After stage four sleep, stage three and stage two sleeps are repeated to begin with going into REM sleep. When REM sleep is over, the body comm precisely returns to stage two sleep. The sleep cycle may go through these stages round four or five ti me throughout the darkness; however, most people cannot get through stage one successfully. In stage one, the body enters into a light sleep. The heart rate slows down and breathing locomotes irregular. This is cognize as a transitional stage between macrocosm fully waken and sleep. The brain produces four to seven bicycle of theta waves which are the minute of arc slowest frequency of brain waves. The muscles in the body become very relaxed; however, one may emotional state choppy twitches and hypnic jerks. A hypnic jerk is an involuntary twitch which occurs during hypnagogia, ofttimes causing a someone to awaken suddenly resembling a skim experienced by a person who is floor and is come with what one would describe as a travel awareness. A hypnic jerk can make a person slightly aware of their surroundings and will lots tell apart that they were not sleep. They are not dreaming nor do they score rapid eye movement during this stage. This phase only lasts about(predicate) ! five to ten minutes. During stage two, the brain starts touching into sleep spindles, which are short bursts of distinctive brain- wave activity. The body temperature...If you call for to get a full essay, order it on our website: OrderEssay.net

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