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REM Sleep

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What is the nature of REM sleep? Why is it important to sleep?

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Solution Summary

This solution examines the nature of Rapid Eye Movement (REM) sleep, and why it is important to sleep.

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1. What is the nature of REM sleep?

Rapid eye movement sleep (REM) sleep is the portion of sleep when there are rapid eye movements (REMs) and when dreams occur.

o REM sleep is classified into two categories: tonic and phasic (Kryger, Roth & Dement, 2000).
o Dreams occur during REM sleep. People typically have 3 to 5 periods of REM sleep per night.
o They occur at intervals of 1-2 hours and are quite variable in length. An episode of REM sleep may last 5 minutes or over an hour.
o About 20% of sleep is REM sleep. If you sleep 7-8 hours a night, perhaps an hour and half of that time, 90 minutes, is REM sleep.
o A newborn baby spends more than 80% of total sleep time in REM.

o During REM, the activity of the brain's neurons is similar to that during waking hours, for this particular reason, the phenomenon is called paradoxical sleep, which means that there are no dominating brain waves during REM sleep (http://www.luciddreaming.com/information/dream-stages.php).

o REM sleep is characterized by a number of other features including rapid, low-voltage brain waves detectable on the electroencephalographic (EEG) recording, irregular breathing and heart rate and involuntary muscle jerks ...

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