Document Detail

The emergence of the sleep-wake cycle in infancy.
MedLine Citation:
PMID:  3759407     Owner:  NLM     Status:  MEDLINE    
In order to investigate the appearance of a rest-activity periodicity, spontaneous motor behavior of five low-risk preterm infants (gestational age range 27-31 weeks) was monitored for 24 hours at weekly intervals until term. Using a time lapse videorecorder (6.5 fields/sec.) both slow and rapid movements were counted every three minutes; this interval was adopted as basic chronological paradigm in order to evaluate the daily distribution of motor activity. The results of quantitative analysis showed a developmental trend of motor behavior which increased from earliest conceptional ages (C.A.) until 32-33 weeks, and decreased around 36-37 weeks C.A. Prolonged complete rest intervals are rare at low C.A., while in older infants (approx. 40 weeks C.A.) an initial tendency to organize motor activity in ultradian cycle-like periods seems to be more evident, contemporary with consolidated behavioral states.
C Faienza; C Capone; M C Galgano; E Sani
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Italian journal of neurological sciences     Volume:  Suppl 5     ISSN:  0392-0461     ISO Abbreviation:  Ital J Neurol Sci     Publication Date:  1986 Apr 
Date Detail:
Created Date:  1986-11-03     Completed Date:  1986-11-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8006502     Medline TA:  Ital J Neurol Sci     Country:  ITALY    
Other Details:
Languages:  eng     Pagination:  37-42     Citation Subset:  IM    
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MeSH Terms
Activity Cycles
Brain / growth & development
Child Development*
Fetus / physiology
Infant, Newborn / physiology*
Infant, Premature
Sleep / physiology*
Sleep Stages / physiology

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