EAR OF CHAMELEON - ROUND WINDOW PROBLEM

被引:7
作者
WEVER, EG
机构
[1] Auditory Research Laboratories, Princeton University, Princeton, New Jersey
来源
JOURNAL OF EXPERIMENTAL ZOOLOGY | 1969年 / 171卷 / 01期
关键词
D O I
10.1002/jez.1401710102
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
An examination of serial sections of the ears of several specimens of Chamaeleo senegalensis and Chamaeleo quilensis gives support to an earlier suggestion that these ears function by means of a substitute round window. The usual type of round window is absent, but there is a tortuous pathway leading from the scala tympani through the perilymphatic recess and then along the foramen of the glossopharyngeal nerve to the air cavity of the middle ear. This pathway makes possible a mobilization of the cochlear fluids in response to sound pressures exerted at the oval window by the columellar footplate. However, the mechanism is somewhat inefficient; the frictional resistance along the pathway reduces the amplitude of cochlear motion. The relatively poor sensitivity of these chameleon ears is thus largely accounted for. Copyright © 1969 Wiley‐Liss, Inc., A Wiley Company
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[1]   EAR OF CHAMELEON - CHAMAELEO SENEGALENSIS AND CHAMAELEO QUILENSIS [J].
WEVER, EG .
JOURNAL OF EXPERIMENTAL ZOOLOGY, 1968, 168 (04) :423-&