Document Detail


The relationship between MOC reflex and masked threshold.
MedLine Citation:
PMID:  21878379     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Otoacoustic emission (OAE) amplitude can be reduced by acoustic stimulation. This effect is produced by the medial olivocochlear (MOC) reflex. Past studies have shown that the MOC reflex is related to listening in noise and attention. In the present study, the relationship between strength of the contralateral MOC reflex and masked threshold was investigated in 19 adults. Detection thresholds were determined for 1000-Hz, 300-ms tone presented simultaneously with one repetition of a 300-ms masker in an ongoing train of masker bursts. Three masking conditions were tested: 1) broadband noise 2) a fixed-frequency 4-tone complex masker and 3) a random-frequency 4-tone complex masker. Broadband noise was expected to produce energetic masking and the tonal maskers were expected to produce informational masking in some listeners. DPOAEs were recorded at fine frequency intervals from 500 to 4000 Hz, with and without contralateral acoustic stimulation. MOC reflex strength was estimated as a reduction in baseline level and a shift in frequency of DPOAE fine-structure maxima near 1000-Hz. MOC reflex and psychophysical testing were completed in separate sessions. Individuals with poorer thresholds in broadband noise and in random-frequency maskers were found to have stronger MOC reflexes.
Authors:
Angela Garinis; Lynne Werner; Carolina Abdala
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, N.I.H., Extramural     Date:  2011-08-26
Journal Detail:
Title:  Hearing research     Volume:  282     ISSN:  1878-5891     ISO Abbreviation:  Hear. Res.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-12-05     Completed Date:  2012-04-02     Revised Date:  2014-09-13    
Medline Journal Info:
Nlm Unique ID:  7900445     Medline TA:  Hear Res     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  128-37     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 Elsevier B.V. All rights reserved.
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MeSH Terms
Descriptor/Qualifier:
Acoustic Stimulation
Adult
Attention
Audiometry, Pure-Tone
Auditory Pathways / physiology*
Auditory Perception*
Auditory Threshold*
Cochlea / innervation*
Female
Humans
Male
Noise / adverse effects*
Olivary Nucleus / physiology*
Otoacoustic Emissions, Spontaneous*
Perceptual Masking*
Psychoacoustics
Reflex*
Young Adult
Grant Support
ID/Acronym/Agency:
F32 DC011255-01A1/DC/NIDCD NIH HHS; P30 DC004661/DC/NIDCD NIH HHS; R01 DC000396/DC/NIDCD NIH HHS; R01 DC000396/DC/NIDCD NIH HHS; R01 DC000396-14/DC/NIDCD NIH HHS; R01 DC003552/DC/NIDCD NIH HHS; R01 DC003552/DC/NIDCD NIH HHS; R01 DC003552-06/DC/NIDCD NIH HHS; T32 DC005361/DC/NIDCD NIH HHS
Comments/Corrections

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