Japanese

NEGATIVE DEFLECTIONS IN THE STAPEDIAL REFLEX RECORDING Yasuya Nomura 1 pp.19-25
Published Date 1979/1/20
DOI https://doi.org/10.11477/mf.1492208848
  • Abstract
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 When the stapedial reflex is elicited by a contralateral sound stimulation, a wave form of impedance increase is usually obtained. A double negative deflection and a downward deflection are wave forms which indicate impedance decrease.

 The double negative deflection has been said to be observed only in patients with early otosclerosis. However, the present study revealed that it was seen in normal hearing persons and patients with ear diseases other than early otosclerosis. The downward deflection had some characteristics in wave forms. This was due to inward movement of the eardrum by the middle ear muscles.


Copyright © 1979, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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