Deconstructing Sleep

Deconstructing Sleep
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Five Stages Of Sleep

Electrical activity in the brain recorded during sleep

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1. Light sleep: Muscles relax, body temperature drops, you drift in and out of wakefulness. Fragmented images may appear.

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2. Transition: Heart rate, breathing and waves of electrical activity in the brain slow down

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3. Deep Sleep: Large, slow waves in the brain.

4. The body becomes harder to awaken as it closes itself off to stimuli. In the fourth stage the waves are similar, but slower.

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5. REM(Rapid Eye Movement): Eyes flutter, but the body is paralysed. Heartbeat and blood pressure rise along with brain activity. Dreams appear at this stage.

Source: Dr P.P. Bose, Orthonova Hospital, Delhi

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