NREM sleep (Non–rapid eye Movement sleep ) includes sleep stages 1 through 4.

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Non-rapid eye movement sleep at psychology-glossary.com■■■■■■
Non-rapid eye movement sleep (NonREM, NREM) refers to a type of sleep that is divided into four (4) stages. . . . Read More
Non-REM sleep at psychology-glossary.com■■■■■■
Non-REM sleep (NonREM sleep or just NREM) which is another name for Non-rapid eye movement sleep refers . . . Read More
Rapid eye movement sleep at psychology-glossary.com■■■■■■
Rapid eye movement sleep also known as REM is a stage of sleep that accounts for approximately two (2) . . . Read More
Night terror at psychology-glossary.com■■■■■
Night terror is defined as a state of panic during NREM sleep. An experience of intense anxiety during . . . Read More
Somnambulism at psychology-glossary.com■■■■■
Somnambulism refers to sleepwalking. It is the purposeful moving, usually but not always including walking, . . . Read More
Polysomnography at psychology-glossary.com■■■■■
Polysomnography is a diagnostic test used to study a person's sleep patterns and detect sleep disorders. . . . Read More
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Nightmare: nightmare refers to frightening and anxiety-provoking dream occurring during rapid eye movement . . . Read More
Rapid eye movement (REM) sleep at psychology-glossary.com■■■■■
Rapid eye movement (REM) sleep: Rapid eye movement: rapid eye movement (REM) sleep refers to the periodic . . . Read More
CSA (Central Sleep Apnea) at psychology-glossary.com■■■■■
CSA (Central Sleep Apnea) : CSA is the acronym of Central Sleep Apnea which is a type of Apnea that occurs . . . Read More
Obstructive sleep Apnea at psychology-glossary.com■■■■■
Obstructive sleep Apnea refers to Apnea that occurs most often during rapid eye movement (REM) sleep . . . Read More