Document Detail

Physiological vulnerability of distortion product otoacoustic emissions from the amphibian ear.
MedLine Citation:
PMID:  14587603     Owner:  NLM     Status:  MEDLINE    
The physiological vulnerability of distortion product otoacoustic emissions (DPOAEs) was investigated in the leopard frog, Rana pipiens pipiens. For each frog, DPOAEs were recorded from the amphibian and the basilar papillae. Measurements were taken before and after either the arrest of oxygen supply due to cardioectomy, or the destruction of the central nervous system (CNS). DPOAEs in response to high-level stimuli (> 75 dB SPL) were rather robust to these insults during the first two hours post surgery. In contrast, DPOAE amplitudes in response to low-level stimuli (< 75 dB SPL) decreased significantly. On average, low-level emissions from the amphibian papilla disappeared within 6 min for cardioectomy, and after 13 min for CNS destruction. In the basilar papilla, low-level DPOAEs disappeared more slowly: on average after 34 min following cardioectomy, and after 58 min for CNS destruction. The difference in physiological vulnerability between low- and high-level emissions is similar to that in mammals and a lizard. The difference between the DPOAE decay rate of the frog's amphibian and basilar papillae suggests important differences between the hearing mechanisms of the papillae.
Pim van Dijk; Peter M Narins; Matthew J Mason
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  The Journal of the Acoustical Society of America     Volume:  114     ISSN:  0001-4966     ISO Abbreviation:  J. Acoust. Soc. Am.     Publication Date:  2003 Oct 
Date Detail:
Created Date:  2003-10-31     Completed Date:  2004-01-14     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  7503051     Medline TA:  J Acoust Soc Am     Country:  United States    
Other Details:
Languages:  eng     Pagination:  2044-8     Citation Subset:  IM    
Department of Otorhinolaryngology and Head & Neck Surgery, University Hospital Maastricht, P.O. Box 5800, 6202 AZ Maastricht, The Netherlands.
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MeSH Terms
Acoustic Stimulation
Anoxia / physiopathology*
Auditory Pathways / physiopathology*
Basilar Membrane / physiopathology
Central Nervous System / physiopathology*
Cochlea / physiopathology
Hair Cells, Auditory, Outer / physiopathology
Otoacoustic Emissions, Spontaneous / physiology*
Perceptual Distortion / physiology*
Rana pipiens / physiology*
Species Specificity
Grant Support

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