Document Detail

The effect of labor on olfactory exposure learning within the first postnatal hour.
MedLine Citation:
PMID:  11996306     Owner:  NLM     Status:  MEDLINE    
Thirty-one neonates delivered by cesarean section were exposed to an odor for 30 min shortly after birth. Fifteen births had uterine labor contractions before delivery; 16 were without contractions. All babies were later tested (median age = 80 hr) for their responses to the familiar exposure odor and a novel odor presented on either side of the face. Overall, the babies spent more time turned toward the exposure odor than toward the novel scent. Babies in the labor condition, but not those bom without labor, displayed a significant preference for the exposure odor. Norepinephrine (NE) levels were higher in babies who oriented preferentially toward the exposure odor. Brief exposure immediately after birth is sufficient for the development of olfactory learning. Heightened learning by neonates from births with contractions may reflect locus coeruleus and NE activation. Olfactory learning may therefore be particularly efficient shortly after birth.
Heili Varendi; Richard H Porter; Jan Winberg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Behavioral neuroscience     Volume:  116     ISSN:  0735-7044     ISO Abbreviation:  Behav. Neurosci.     Publication Date:  2002 Apr 
Date Detail:
Created Date:  2002-05-08     Completed Date:  2002-10-25     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8302411     Medline TA:  Behav Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  206-11     Citation Subset:  IM    
Department of Pediatrics, University of Tartu, Estonia.
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MeSH Terms
Infant, Newborn
Labor, Obstetric*
Norepinephrine / metabolism
Postpartum Period*
Smell / physiology*
Time Factors
Reg. No./Substance:

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