Deep sleep refers to 3rd and 4th stages of NREM sleep during which delta waves are produced.

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Delta sleep at■■■■■
Delta sleep refers to slow wave sleep, stages 3 and 4 of NREM sleep. . . . Read More
Non-rapid eye movement sleep at■■■■
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■■■■
Non-REM sleep (NonREM sleep or just NREM) which is another name for Non-rapid eye movement sleep refers . . . Read More
NREM Sleep at■■■■
NREM Sleep is the abbreviations of Non-rapid eye movement sleep which is a type of sleep that is divided . . . Read More
Delta waves at■■■
Delta waves refer to brain waves with a high amplitude and a frequency of less than 4 cycles per second . . . Read More
NREM sleep (Non–rapid eye Movement sleep) at■■■
NREM sleep (Non–rapid eye Movement sleep): NREM sleep (Non–rapid eye Movement sleep ) includes sleep . . . Read More
Light/Deep sleep at■■■
Light/Deep sleep refers to a stage of sleep which is described below: ; - ; - Your brain waves move fast . . . Read More
Light sleep at■■■
Light sleep refers to Stage 1 sleep, marked by small irregular brainwaves and some alpha waves. . . . Read More
Polysomnography at■■■
Polysomnography is a diagnostic test used to study a person's sleep patterns and detect sleep disorders. . . . Read More
Hertz (Hz) at■■
Hertz (Hz) is defined as the unit for designating the frequency of a tone. One Hertz equals one cycle . . . Read More