Origin of Summating Potential
作者:
J. R. Johnstone,
B. M. Johnstone,
期刊:
The Journal of the Acoustical Society of America
(AIP Available online 1966)
卷期:
Volume 40,
issue 6
页码: 1405-1413
ISSN:0001-4966
年代: 1966
DOI:10.1121/1.1910240
出版商: Acoustical Society of America
数据来源: AIP
摘要:
The relationship between sound and cochlear potentials is considered in the light of von Békésy's observations of movement of the cochlear partition and Davis' variable‐resistance theory of hair‐cell function. An equation is derived relating hair angle to basilar‐membrane movement. The equation isφ = arcot (Yα+cotφ0)where φ is the hair angle and α is proportional to basilar‐membrane movement. φ0is the resting hair angle.Yis the ratio of the distance between basilar membrane and hair cell apex to the distance between tectorial membrane and hair‐cell apex. It is shown that the sigmoidal shape of this function leads to a linear dependence of microphonics on sound intensity, generation of harmonics, and production of positive and negative summating potentials by inner and outer hair cells, respectively. The behavior of the cochlear potentials, including the effect of sound pressure in reversing summating potential polarity, effect of cochlear pressure changes, and reversal of summating potential polarity with anoxia, is also accounted for. A mechanical model of the organ of Corti, used to illustrate our theory, is described, together with results obtained from the model.
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