Biological Rhythms & Theories of Sleep

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6 Terms

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Circadian Rhythm
A cycle of physiological and biological processes that fluctuate on a roughly 24-hour timetable (e.g., 16 hours awake, 8 hours asleep).
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Wake/Sleep Cycle
Sleep has a biological rhythm, cycling through 5 stages every 90–120 minutes.
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Circadian Rhythm Disruptions
An out-of-sync cycle often due to a mismatch between the sleep-wake schedule required by a person's environment or occupational circumstances.
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Energy Conservation Theory of Sleep (Evolutionary Approach)
The idea that sleep protects us and helps animals adapt to their environment to survive.
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Restoration Theory of Sleep
The concept that our bodies wear out during the day and use up hormones, neurotransmitters, and energy, making sleep necessary to restore resources, reenergize the body, restore/repair muscles and brain tissue, and support growth.
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Memory Consolidation Theory of Sleep
The idea that sleep helps us restore and rebuild memories of the day's experiences (occurs during REM sleep).