Document Detail

Development of vestibular evoked myogenic potentials in preterm neonates.
MedLine Citation:
PMID:  18087148     Owner:  NLM     Status:  MEDLINE    
Our recent study successfully recorded vestibular evoked myogenic potential (VEMP) responses in full-term newborns. However, when VEMP responses are elicited in preterm neonates remains unclear. This study employed the VEMP test in 27 low-risk preterm and 25 healthy full-term neonates without sedation to investigate the development of VEMP response after birth. Fourteen (26%) of 54 ears in preterm neonates exhibited VEMP responses, a response rate significantly lower than that of full-term neonates (72%). The mean latencies of peaks p13 and n23 in the preterm group were significantly longer than those in the full-term group. Analysis of variable parameters for present VEMPs in pre- and full-term neonates revealed that the cutoff values of body weight were 2.26 and 2.82 kg, and that those of postmenstrual age were 37.1 and 38.4 weeks, respectively. Both body weight and postmenstrual age were significantly negatively correlated with p13 and n23 latencies but not with p13-n23 amplitude. In conclusion, present VEMPs can be anticipated when the body weight of pre- and full-term neonates reaches >2.26 and 2.82 kg, respectively. It indicates that the sacculocollic reflex develops in the same manner, but the difference in response rate between full- and pre-term neonates may, at least in part, correlate with muscle bulk and strength, relative to the body weight adequate for the VEMP response.
Shou-Jen Wang; Chun-Nan Chen; Wu-Shiun Hsieh; Yi-Ho Young
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-12-12
Journal Detail:
Title:  Audiology & neuro-otology     Volume:  13     ISSN:  1421-9700     ISO Abbreviation:  Audiol. Neurootol.     Publication Date:  2008  
Date Detail:
Created Date:  2008-04-10     Completed Date:  2008-08-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9606930     Medline TA:  Audiol Neurootol     Country:  Switzerland    
Other Details:
Languages:  eng     Pagination:  145-52     Citation Subset:  IM    
Copyright Information:
(c) 2007 S. Karger AG, Basel
Department of Otolaryngology, Catholic Cardinal Tien Hospital and School of Medicine, Fu-Jen Catholic University, Taipei, Taiwan.
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MeSH Terms
Apgar Score
Cochlear Nerve / physiology
Evoked Potentials, Auditory / physiology*
Gestational Age
Infant, Newborn
Infant, Premature
Myelin Sheath / physiology
Reference Values
Sleep / physiology
Vestibule, Labyrinth / physiology*

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