Document Detail

Influence of gestational age and postnatal age on speech sound processing in NICU infants.
MedLine Citation:
PMID:  22332725     Owner:  NLM     Status:  MEDLINE    
The study examined the effect of gestational (GA) and postnatal (PNA) age on speech sound perception in infants. Auditory event-related potentials (ERPs) were recorded in response to speech sounds (syllables) in 50 infant NICU patients (born at 24-40 weeks gestation) prior to discharge. Efficiency of speech perception was quantified as absolute difference in mean amplitudes of ERPs in response to vowel (/a/-/u/) and consonant (/b/-/g/, /d/-/g/) contrasts within 150-250, 250-400, 400-700 ms after stimulus onset. Results indicated that both GA and PNA affected speech sound processing. These effects were more pronounced for consonant than vowel contrasts. Increasing PNA was associated with greater sound discrimination in infants born at or after 30 weeks GA, while minimal PNA-related changes were observed for infants with GA less than 30 weeks. Our findings suggest that a certain level of brain maturity at birth is necessary to benefit from postnatal experience in the first 4 months of life, and both gestational and postnatal ages need to be considered when evaluating infant brain responses.
Alexandra P F Key; E Warren Lambert; Judy L Aschner; Nathalie L Maitre
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't     Date:  2012-02-14
Journal Detail:
Title:  Psychophysiology     Volume:  49     ISSN:  1540-5958     ISO Abbreviation:  Psychophysiology     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-04-11     Completed Date:  2012-08-07     Revised Date:  2013-06-26    
Medline Journal Info:
Nlm Unique ID:  0142657     Medline TA:  Psychophysiology     Country:  United States    
Other Details:
Languages:  eng     Pagination:  720-31     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Society for Psychophysiological Research.
Vanderbilt Kennedy Center for Research on Human Development, Vanderbilt University, Nashville, Tennessee 37203, USA.
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MeSH Terms
Aging / physiology*
Data Interpretation, Statistical
Evoked Potentials / physiology
Gestational Age*
Infant, Newborn
Infant, Premature
Intensive Care Units, Neonatal*
Sex Characteristics
Speech Perception / physiology*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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