A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions
Objective: Acoustic stimulation of auditory efferent system causes contralateral shift in the OAEs amplitude. In this study the contralateral suppression effect of pure tone & NBN at center frequencies of 1, 2 & 4 kHz Frequencies has been evaluated in the right ears of normal 19 to 27 years...
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University of Social Welfare and Rehabilitation Sciences
2004-10-01
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doaj-239fe03d38ea4b7e95a2b3eaada0e6ce2020-11-25T01:01:47ZfasUniversity of Social Welfare and Rehabilitation SciencesJournal of Rehabilitation1607-29601607-29602004-10-01531319A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic EmissionsAmir Abbas Ebrahimi0Seyyedeh Mahnaz Ahmadi1Saeed Sarough-Farahani2Soghrat Faghih-Zadeh3Yousef Salim-Pour4Razieh Zenouzi5 Department of Audiology Objective: Acoustic stimulation of auditory efferent system causes contralateral shift in the OAEs amplitude. In this study the contralateral suppression effect of pure tone & NBN at center frequencies of 1, 2 & 4 kHz Frequencies has been evaluated in the right ears of normal 19 to 27 years old adults. Materials & Methods: The data were elicited from 37 subjects (15 males & 22 females) with normal hearing who participated in this study. After determining the level of NBN by loudness adjustment between pure tone at 70 dBHL at 1, 2 & 4 kHz in left ear, EOAEs was measured using tone burst at central frequencies of 1, 2 & 4 kHz in right ear. Then the amplitude shift of TBEOAEs was evaluated at the presence of contralateral pure tone & NBN stimuli. Results: There was a significant shift in the amplitude of TBEOAEs by contralateral stimulation of pure tone & NBN which was greater in NBN. The magnitude of amplitude shift was become greater at high frequencies of contalateral stimuli. Conclusion: There was a decrease in the amplitude of TBEOAEs by contralateral stimulation and the stimulus with greater frequency band had geater effects on contralateral suppression. The impact of this effect was highly depend on the spectrum & frequency of contralateral stimuli.http://rehabilitationj.uswr.ac.ir/browse.php?a_code=A-10-1-112&slc_lang=en&sid=1Tone burst evoked otoacoustic emissions Contralateral supression Olivocoachlear bundle |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Amir Abbas Ebrahimi Seyyedeh Mahnaz Ahmadi Saeed Sarough-Farahani Soghrat Faghih-Zadeh Yousef Salim-Pour Razieh Zenouzi |
spellingShingle |
Amir Abbas Ebrahimi Seyyedeh Mahnaz Ahmadi Saeed Sarough-Farahani Soghrat Faghih-Zadeh Yousef Salim-Pour Razieh Zenouzi A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions Journal of Rehabilitation Tone burst evoked otoacoustic emissions Contralateral supression Olivocoachlear bundle |
author_facet |
Amir Abbas Ebrahimi Seyyedeh Mahnaz Ahmadi Saeed Sarough-Farahani Soghrat Faghih-Zadeh Yousef Salim-Pour Razieh Zenouzi |
author_sort |
Amir Abbas Ebrahimi |
title |
A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions |
title_short |
A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions |
title_full |
A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions |
title_fullStr |
A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions |
title_full_unstemmed |
A Comparative Study on the Contralateral Supression Effects of Acoustic Stimulations on Otoacoustic Emissions |
title_sort |
comparative study on the contralateral supression effects of acoustic stimulations on otoacoustic emissions |
publisher |
University of Social Welfare and Rehabilitation Sciences |
series |
Journal of Rehabilitation |
issn |
1607-2960 1607-2960 |
publishDate |
2004-10-01 |
description |
Objective: Acoustic stimulation of auditory efferent system causes contralateral shift in the OAEs amplitude. In this study the contralateral suppression effect of pure tone & NBN at center frequencies of 1, 2 & 4 kHz Frequencies has been evaluated in the right ears of normal 19 to 27 years old adults.
Materials & Methods: The data were elicited from 37 subjects (15 males & 22 females) with normal hearing who participated in this study. After determining the level of NBN by loudness adjustment between pure tone at 70 dBHL at 1, 2 & 4 kHz in left ear, EOAEs was measured using tone burst at central frequencies of 1, 2 & 4 kHz in right ear. Then the amplitude shift of TBEOAEs was evaluated at the presence of contralateral pure tone & NBN stimuli.
Results: There was a significant shift in the amplitude of TBEOAEs by contralateral stimulation of pure tone & NBN which was greater in NBN. The magnitude of amplitude shift was become greater at high frequencies of contalateral stimuli.
Conclusion: There was a decrease in the amplitude of TBEOAEs by contralateral stimulation and the stimulus with greater frequency band had geater effects on contralateral suppression. The impact of this effect was highly depend on the spectrum & frequency of contralateral stimuli. |
topic |
Tone burst evoked otoacoustic emissions Contralateral supression Olivocoachlear bundle |
url |
http://rehabilitationj.uswr.ac.ir/browse.php?a_code=A-10-1-112&slc_lang=en&sid=1 |
work_keys_str_mv |
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