Document Detail


Psychophysical evidence of damaged active processing mechanisms in Belgian Waterslager Canaries.
MedLine Citation:
PMID:  19082827     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Belgian Waterslager canaries (BWC), bred for a distinct low-pitched song, have an inherited high-frequency hearing loss associated with hair cell abnormalities. Hair cells near the abneural edge of the papilla, which receive primarily efferent innervation in normal birds, are among the most severely affected. These cells are thought to support nonlinear active processing in the avian ear, though the mechanisms are poorly understood. Here we present psychophysical evidence that suggests degraded active processing in BWC compared to normal-hearing non-BWC. Critical ratios, psychophysical masking patterns and phase effects on masking by harmonic complexes were measured in BWC and non-BWC using operant conditioning procedures. Critical ratios were much larger in BWC than in non-BWC at high frequencies. Psychophysical tuning curves derived from the masking patterns for BWC were broadened at high frequencies. BWC also showed severely reduced phase effects on masking by harmonic complexes compared to non-BWC. As has been hypothesized previously for hearing-impaired humans, these results are consistent with a loss of active processing mechanisms in BWC.
Authors:
Amanda M Lauer; Robert J Dooling; Marjorie R Leek
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural     Date:  2008-12-12
Journal Detail:
Title:  Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology     Volume:  195     ISSN:  0340-7594     ISO Abbreviation:  J. Comp. Physiol. A Neuroethol. Sens. Neural. Behav. Physiol.     Publication Date:  2009 Feb 
Date Detail:
Created Date:  2009-02-02     Completed Date:  2009-04-30     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  101141792     Medline TA:  J Comp Physiol A Neuroethol Sens Neural Behav Physiol     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  193-202     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Auditory Perception / physiology
Auditory Perceptual Disorders / physiopathology*
Bird Diseases / physiopathology*
Canaries / abnormalities*
Conditioning, Operant
Hair Cells, Auditory, Inner / pathology*
Hearing Loss, High-Frequency / physiopathology,  veterinary*
Organ of Corti / abnormalities,  physiopathology*
Grant Support
ID/Acronym/Agency:
DC-005450/DC/NIDCD NIH HHS; DC-00626/DC/NIDCD NIH HHS; DC-01372/DC/NIDCD NIH HHS; DC-04664/DC/NIDCD NIH HHS; F31 DC005450/DC/NIDCD NIH HHS; F31 DC005450-03/DC/NIDCD NIH HHS; P30 DC004664/DC/NIDCD NIH HHS; P30 DC004664-08/DC/NIDCD NIH HHS; R01 DC000626/DC/NIDCD NIH HHS; R01 DC000626-21/DC/NIDCD NIH HHS; R01 DC001372/DC/NIDCD NIH HHS; R01 DC001372-12/DC/NIDCD NIH HHS
Comments/Corrections

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