Document Detail

Physiological correlates of memory recall in infancy: vagal tone, cortisol, and imitation in preterm and full-term infants at 6 months.
MedLine Citation:
PMID:  20189251     Owner:  NLM     Status:  MEDLINE    
We examined the role of physiological regulation (heart rate, vagal tone, and salivary cortisol) in short-term memory in preterm and full-term 6-month-old infants. Using a deferred imitation task to evaluate social learning and memory recall, an experimenter modeled three novel behaviors (removing, shaking, and replacing a glove) on a puppet. Infants were tested immediately after being shown the behaviors as well as following a 10-min delay. We found that greater suppression of vagal tone was related to better memory recall in full-term infants tested immediately after the demonstration as well as in preterm infants tested later after a 10-min delay. We also found that preterm infants showed greater coordination of physiology (i.e., tighter coupling of vagal tone, heart rate, and cortisol) at rest and during retrieval than full-term infants. These findings provide new evidence of the important links between changes in autonomic activity and memory recall in infancy. They also raise the intriguing possibility that social learning, imitation behavior, and the formation of new memories are modulated by autonomic activity that is coordinated differently in preterm and full-term infants.
David W Haley; Ruth E Grunau; Joanne Weinberg; Adi Keidar; Tim F Oberlander
Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2010-02-26
Journal Detail:
Title:  Infant behavior & development     Volume:  33     ISSN:  1934-8800     ISO Abbreviation:  Infant Behav Dev     Publication Date:  2010 Apr 
Date Detail:
Created Date:  2010-03-24     Completed Date:  2010-06-23     Revised Date:  2013-05-30    
Medline Journal Info:
Nlm Unique ID:  7806016     Medline TA:  Infant Behav Dev     Country:  United States    
Other Details:
Languages:  eng     Pagination:  219-34     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier Inc. All rights reserved.
Department of Psychology, University of Toronto, 1265 Military Trail, M1C 1A4 Canada.
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MeSH Terms
Autonomic Nervous System / physiology*
Heart Rate / physiology*
Hydrocortisone / analysis*
Imitative Behavior / physiology
Infant, Newborn
Infant, Premature
Learning / physiology
Mental Recall / physiology*
Neuropsychological Tests
Saliva / chemistry*
Social Behavior
Time Factors
Vagus Nerve / physiology*
Grant Support
156680//PHS HHS; HD39783/HD/NICHD NIH HHS; MOP42469//Canadian Institutes of Health Research; R01 HD039783-01/HD/NICHD NIH HHS
Reg. No./Substance:

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