sleep stage 4

sleep stage 4

NREMS stage 4 Sleep disorders The last period of sleep Accounts for 12-15% of total sleep time, SS4 is similar to NREMS stage 3, except that high-voltage, slow EEG waves cover ≥ 50% of the record; somnambulism, sleep terror, and sleep-related enuresis generally start in stage 4 or during arousals from SS4

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.