All-night EEG sleep measurements in young adults

Abstract

The EEG sleep characteristics of normal, young adults were measured for three consecutive nights. The mean percentage of Stages 1-REM, 3 and 4 showed an increase with each consecutive night. Within a night’s sleep, Stages 3 and 4 decreased markedly and Stage 1-REM increased considerably from the first to the second half of the night. The mean duration of REMPs increased from the first to third REMP and then leveled off. The mean interval between REMPs range from 90 to 110 min. with some indication that the cycle shortens late in the morning. © 1967, Psychonomic Press. All rights reserved.