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Title
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New insights into vibration of the middle ear
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Author
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Abstract
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| To investigate the relationship between the motion of the malleus, incus and stapes in the middle ear of the cat, the three-dimensional (3D) vibrations of the three ossicles were measured in the same ear utilizing a confocal heterodyne interferometer. Each ossicle was treated as a separate rigid body and its motion was calculated individually. The motion parameters derived from this calculation were combined to animate a 3D model of the complete middle ear. While the malleus vibration changed from simple, nearly hinged motion at low frequencies to very complex motion at higher frequencies, the stapes moved in a predominantly piston-like way. The incus transforms the complex malleus motion into the simple motion of the stapes. The incudo-stapedial joint plays a major role in this complex transmission mechanism. It is accepted that the ossicles rotate around a fixed axis and function as mechanical levers. The authors' precise vibration measurements on malleus do not confirm this theory. |
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Language
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English
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Source (book)
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2nd International Symposium on Middle Ear Mechanics in Research and, Otosurgery, Oct. 21-24, 1999, Boston, Mass.
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Publication
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The Hague
:
Kugler
,
2000
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ISBN
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90-6299-181-5
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Volume/pages
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(2000)
, p. 23-38
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ISI
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000168820700002
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