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Role of Tensor Tympani Muscle in the Middle Ear Muscle Reflex Tomoyuki Haji 1 1Department of Otolarynology, Kochi Medical School pp.887-894
Published Date 1982/11/20
DOI https://doi.org/10.11477/mf.1492209519
  • Abstract
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 Though a considerable number of study on the reflex of the tensor tympani muscle has been reported, its role in the middle ear muscle reflex has not been fully understood, espesially in human being. In order to reveal the agreement and controversy on this problem and to find out any cue for further investigation in this field, we revieweda large number of the literature related to thit muscle.

 They are summarized as follows : 1) The tensor tympani muscle contracts not only by acoustic stimulation but also by several kinds of non-acoustic stimulation. 2) The eardrum moves inward when it contracts. 3) The tensor tympani muscle much less influences the acoustic impedance than the stapedius muscle. 4) The reflex is accepted as a part of general startle reflex. 5) There are several theories on the physiological meaning of the tensor tympani muscle reflex, for instance, protection of the inner ear from loud noise, filter of sound, pump-like function to help tubal ventilation and so on.

 But the evidences which support those hypotheses have not yet been available. New method and new idea to approach to the physiology of ther muscle seems to be necessary to solve this rather complexed problem.


Copyright © 1982, 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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