Title
New insights into vibration of the middle ear New insights into vibration of the middle ear
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
conferenceObject
Publication
The Hague :Kugler, [*]
Subject
Physics
Human medicine
Engineering sciences. Technology
Source (book)
2nd International Symposium on Middle Ear Mechanics in Research and, Otosurgery, Oct. 21-24, 1999, Boston, Mass.
ISBN
90-6299-181-5
ISI
000168820700002
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
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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