Document Detail

Development of auditory asymmetry in transient evoked otoacoustic emissions in pre-term infants.
MedLine Citation:
PMID:  14552427     Owner:  NLM     Status:  MEDLINE    
We previously reported that transient evoked otoacoustic emissions (TEOAEs) continue to develop after the onset of cochlear function in pre-term infants from 34 to 39 weeks of conceptional age (Morlet et al., 1996). The time-course of development differed between genders. Reported here are findings of further analysis of data from the study cohort, comprising 1020 ears of 510 pre-term neonates (conceptional age ranging from 34 to 39 weeks), demonstrating developmental differences between right and left ears. The left ear of female pre-term infants showed enhancement of TEOAE amplitude at low and medium frequencies with age, whereas differences were less dramatic in the right ear. In male infants, TEOAE amplitude decreased in several frequency bands at high frequencies, above 4 kHz, between 34 and 39 weeks conceptional age; most developmental differences were found to be more dramatic in the right than in the left ear. It is tempting to speculate that these developmental features underlie well-known inter-aural asymmetries that have been demonstrated in the adult human.
Thierry Morlet; J D Durrant; A Lapillonne; G Putet; L Collet; R Duclaux
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of the American Academy of Audiology     Volume:  14     ISSN:  1050-0545     ISO Abbreviation:  J Am Acad Audiol     Publication Date:  2003 Aug 
Date Detail:
Created Date:  2003-10-13     Completed Date:  2004-01-15     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9114646     Medline TA:  J Am Acad Audiol     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  339-46     Citation Subset:  IM    
UMR CNRS 5020, Neurosciences et Systemes Sensoriels, Claude Bernard University, Lyon I, France.
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MeSH Terms
Analysis of Variance
Hair Cells, Auditory, Outer / physiopathology
Hearing Disorders / diagnosis*,  physiopathology
Infant, Newborn
Infant, Premature*
Otoacoustic Emissions, Spontaneous*

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