Document Detail

Maturation of auditory steady-state responses in normal babies.
MedLine Citation:
PMID:  16446562     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To track the development of the auditory steady-state response (ASSR) through the neonatal and early infant periods in a group of normal-hearing babies. DESIGN: This longitudinal study involved assessment at four data collection points. ASSR thresholds to modulated 500 Hz and 4 kHz tones were established in 20 full-term subjects at 0, 2, 4, and 6 wks of age. RESULTS: Significant developmental changes were observed for both test frequencies. Mean ASSR threshold levels decreased by approximately 10 dB between the week 0 and week 6 data collection points. CONCLUSIONS: The results of this study indicate that ASSR threshold levels in normal-hearing neonates and young infants are different from those observed in older subjects. Clinical application of the ASSR procedure in this population will need to take into account developmental changes occurring in the first weeks of life. Furthermore, the findings indicate that ASSR thresholds in normal-hearing babies at 6 wks of age are not yet mature.
Gary Rance; Dani Tomlin
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Ear and hearing     Volume:  27     ISSN:  0196-0202     ISO Abbreviation:  Ear Hear     Publication Date:  2006 Feb 
Date Detail:
Created Date:  2006-01-31     Completed Date:  2006-06-01     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8005585     Medline TA:  Ear Hear     Country:  United States    
Other Details:
Languages:  eng     Pagination:  20-9     Citation Subset:  IM    
University of Melbourne, Melbourne, Australia.
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MeSH Terms
Age Factors
Auditory Pathways / physiology*
Auditory Threshold
Child Development / physiology*
Evoked Potentials, Auditory, Brain Stem / physiology*
Infant, Newborn / growth & development,  physiology*
Longitudinal Studies

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