Sleep and Circadian Rhythms

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Sleep Hygiene

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Defined as good sleep habits.

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Circadian Rhythm / Body Clock

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A 24-hour cycle that regulates sleepiness and alertness, driven by light, dark, temperature, exercise, diet, and daily activities.

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Delayed Sleep Phase

Back

The natural shift in adolescents' circadian rhythm to a later time, leading to morning sleepiness.

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Stages of Sleep

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Different phases the body goes through during sleep, including Light sleep, Deep sleep, and REM sleep.

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REM (Rapid Eye Movement) Sleep

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The stage when dreaming occurs and is known to enhance problem-solving.

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Hypnogogic Jerk / Sleep Startle

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The involuntary muscle contraction experienced when falling asleep.

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Melatonin

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A hormone that stimulates sleepiness and is produced in darkness.