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Non Rem Sleep Definition. Medical Definition of non-REM sleep. A state of sleep that occurs regularly during a normal period of sleep with intervening periods of REM sleep and is characterized by delta wave brain activity little dreaming and a reduced level of autonomic physiological activity Non-REM sleep. During NREM the brain waves on the electroencephalographic EEG recording are typically slow and of high voltage the breathing and heart rate are slow and regular the blood pressure is. NREM is further split into three parts.
NREM sleep contains all stages of sleep except REM there are 5 although many debate this instead saying there are 4 stages of sleep. Non-REM sleep occurs in the first four of the five stages of the sleep cycle followed by REM sleep during which dreaming occurs. A period of sleep characterized by rapid periodic twitching movements of the eye muscles and other physiological changes such as accelerated respiration and heart rate increased brain activity and muscle relaxation. Also called NREM sleep orthodox sleep. Sleep is divided into two broad types. Non-REM sleep contains light stages of sleep stage 1 to full sleep Stage 2 and deep or slow wave sleep stages 3 and 4.
Non-REM sleep occurs in the first four of the five stages of the sleep cycle followed by REM sleep during which dreaming occurs.
There are three phases of non-REM sleep commonly referred to as N1 N2 and N3. Add flashcard Cite Random. Commonly referred to as non- REM sleep. During these times that arise most often in the initial hours of sleep the electroencephalogram displays only little activity and there is minimal or no alterations in respiration blood pressure or pulse. However after the occurrence of N3 sleep the deepest stage of sleep the brain signals for the onset of a more aroused state. Sleep labs often observe the brain patterns of people engaged in NREM sleep.