Question

Chanter 6-Sleep -Have a general understanding of the structure of sleep (NREM, REM, and stages) -What is melatonin, where does it come from and why is it important? -What is sleep debt and sleep depravation? -What factors influence sleep?

Answer 1

Have a general understanding of the structure of sleep (NERM, REM, and stages)

There are four stages of sleep: Non-REM (NREM) sleep (Stages 1, 2 & 3) and REM sleep. Periods of wakefulness occur before and intermittently throughout the various sleep stages or as one shifts sleeping position.

Wake is the period when mind wave movement is at its most noteworthy and muscle tone is dynamic.

STAGE 1

Stage 1 is the lightest phase of NREM rest. Frequently characterized by the nearness of moderate eye developments, this lazy rest stage can be effectively disturbed causing enlightenments or feelings of excitement. Muscle tone throughout the body relaxes and brain wave activity begins to slow from that of wake. Once in a while people may encounter hypnic jerks or unexpected muscle fits and may even experience impression of falling while at the same time floating all through Stage 1.

STAGE 2

Stage 2 is the first actual stage of defined NREM sleep. Awakenings or arousals do not occur as easily as in Stage 1 sleep and the slow moving eye rolls discontinue. Mind waves keep on moderating with explicit blasts of fast action known as rest axles intermixed with rest structures known as K buildings. Both rest shafts and K edifices are thought to fill in as security for the cerebrum from arousing from rest. Body temperature starts to diminish and pulse starts to moderate.

STAGE 3

Stage 3 is known as deep NREM sleep. The most restorative stage of sleep, stage 3 consists of delta waves or slow waves. Awakenings or arousals are rare and often it is difficult to awaken someone in Stage 3 sleep.

Parasomnias (sleepwalking, rest talking or somniloquy and night fear) happen amid the most profound phase of rest.

REM SLEEP

REM rest, otherwise called quick eye development, is most usually known as the envisioning stage.  Eye movements are rapid, moving from side to side and brain waves are more active than in Stages 2 & 3 of sleep. Awakenings and arousals can occur more easily in REM; being woken during a REM period can leave one feeling groggy or overly sleepy.

WAKE NREM SLEEP REM SLEEP Stage 0 LIGHT SLEEP DEEP SLEEP Stage R Stage 1 Stage 2 Stage 3 Eyes open, responsive to external stimuli, can hold intelligible conversation Transition between Main bodv of waking and sleep. Iflight sleep awakened, person will claim was never consolidation asleep Slow waves on EEG readings. Brain waves similar to waking. Most vivid dreams happen in this Memory stage. Body does not Synaptic pruning move 16 to 18 hours per day to 7 hours per night 90 to 120 min/night

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