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| a state of awareness including a persons feelings, sensations, ideas and perceptions |
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| A stage of sleep charaterized by rapid eye movement a high level of brain activity. Deep relaxation of muscles and dreaming |
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| The rhythm of activity and inactivity lasting approximately one day |
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| the failure to get enough sleep at night in order to feel rested the next day |
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| a sleep disorder in which a person has trouble brething while sleeping |
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| a condition characterized by suddenly falling asleep or feeling very sleepy during the day |
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| Sleep disruptions that occur during stage IV of sleep, involving screaming, panic, and confusion. |
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| walking or carring out behaviors while asleep |
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| A state of consciousness resulting from a narrowed focus of attention |
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| a suggestion made during hypnosis |
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| the process of learning to control bodily states with the help of machines |
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| the focusing of attention to clear ones mind and produce relaxation |
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| chemicals that affect the nervous system |
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| perceptions that have no direct external cause |
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| drugs that often produce hallucinations |
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| A potent psychedelic drug that produces distortions of perception and thought |
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