A comparative study of quiet sleep, active sleep, and waking on the first 2 days of life.
Direct behavioral observation and motility monitoring procedures provide reliable data, and both are appropriate for sleep/wake state measurements starting immediately after birth. Using these procedures, newborn rats, rabbits, and humans were found to have a greater amount of quiet sleep on the day of birth rather than 24 hr later. Changes in active sleep and wake were inconsistent across the 2 days. The quiet sleep findings are contrary to the developmental course which increases with age. The findings are interpreted as a temporary adaptive response to the stress of the birth process.
Biobehavioral Sciences Graduate Degree Program, University of Connecticut, Storrs, CT 06269, USA.
D A
DA
Carroll
V H
VH
Denenberg
E B
EB
Thoman
D000818:Animals; D000831:Animals, Newborn; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D009043:Motor Activity; D011247:Pregnancy; D011817:Rabbits; D051381:Rats; D012894:Sleep Stages; D012895:Sleep, REM; D013045:Species Specificity; D014851:Wakefulness