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Subject: 
Psychology
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Tags: 
Biology
Sleep
Neurophysiology
Dreaming
Circadian rhythms
Circadian rhythm
Rapid eye movement sleep
Slow-wave sleep
Melatonin
brain
Dream
Non-rapid eye movement sleep
health

Consciousness: Some occur spontaneously: Daydreaming, drowsiness, dreaming. Some are physiologically: Hallucination, orgasm, food or oxygen, starvation. Some are psychologically induced: Sensory deprivation, hypnosis, meditation. Bodily Rhythms Biological Rhythms: periodic physiological fluctuations Grizzly bears hibernating Sleep length Female menstrual cycle 24-hour day cycle (alertness) 90-minute sleep cycle Circadian Rhythms: biological clock that regulates bodily rhythms on a 24-hour cycle. Influenced by LIGHT -> causes our pineal gland to increase or decrease production of melatonin. With age, we shift from night owls to morning birds. What would happen if a person was put into a cave for a long period of time without any light? The body works on a natural 25-hour clock.

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