Changes in the Cochlear‐Microphonic Potential due to Resection of the Efferent Cochlear Fibers

1964 ◽  
Vol 36 (10) ◽  
pp. 1845-1849 ◽  
Author(s):  
G. Rossi ◽  
G. Voena ◽  
G. Cortesina ◽  
S. Buongiovanni
Keyword(s):  
Cochlear Microphonic ◽  
Cochlear Microphonic Potential

Development of mammalian endocochlear potential: normal ontogeny and effects of anoxia

1986 ◽  
Vol 250 (3) ◽  
pp. R493-R498 ◽  
Author(s):  
N. K. Woolf ◽  
A. F. Ryan ◽  
J. P. Harris
Keyword(s):  
Glucose Metabolism ◽  
Mongolian Gerbil ◽  
Hair Cells ◽  
Stria Vascularis ◽  
Organ Of Corti ◽  
Endocochlear Potential ◽  
Cochlear Microphonic ◽  
Cochlear Hair Cells ◽  
Apical Membranes ◽  
Cochlear Microphonic Potential

The development of the positive endocochlear potential (EP), the negative anoxic EP, and the organ of Corti potential were measured at various postnatal ages in the Mongolian gerbil, beginning at 8 days after birth (DAB). The organ of Corti potential (OCP) was present at 8 DAB but averaged 21% less than the adult value. OCP increased regularly with age, reaching adult values of -90 mV by 14 DAB. The positive EP was first observed at 10 DAB, at which age it averaged only 2-3 mV. This potential increased monotonically between 10 and 20 DAB, by which time it had reached the adult value of 75 mV. Anoxia did not result in a negative EP until 12 DAB, at which age this potential averaged -7 mV. The negative anoxic EP matured more rapidly than the positive EP, achieving the adult value of 40 mV by 18 DAB. During development the positive EP appeared to closely parallel the maturation of glucose metabolism in the stria vascularis. The negative anoxic EP was more closely related temporally to the development of cochlear microphonic potential (CM) thresholds. It is hypothesized that changes which occur between 10 and 16 DAB in the apical membranes of the cochlear hair cells contribute to the maturation of both CM and the negative anoxic EP.

Increase in cochlear microphonic potential after toluene administration

2007 ◽  
Vol 230 (1-2) ◽  
pp. 34-42 ◽  
Author(s):  
Robert Lataye ◽  
Katy Maguin ◽  
Pierre Campo
Keyword(s):  
Cochlear Microphonic ◽  
Cochlear Microphonic Potential

Transtympanic Electrocochleography in Patients with Syphilis and Hearing Loss

1977 ◽  
Vol 86 (6) ◽  
pp. 827-834 ◽  
Author(s):  
Richard T. Ramsden ◽  
David A. Moffat ◽  
William P. R. Gibson
Keyword(s):  
Hearing Loss ◽  
Action Potential ◽  
Small Amplitude ◽  
Late Onset ◽  
Cochlear Microphonic ◽  
Congenital Form ◽  
Summating Potential ◽  
Cochlear Microphonic Potential

Transtympanic electrocochleography was carried out on 18 syphilitic patients (30 ears were tested) most of whom were suffering from the late onset congenital form of the disease. A diphasic action potential with a large negative summating potential on the descending limb was found in 77.7% of ears; the cochlear microphonic potential was always of small amplitude. While these findings are not pathognomonic of syphilis, they are characteristic and may be explained on pathological grounds.

Columella footplate motion and the cochlear microphonic potential in the embryo and hatchling chicken

2006 ◽  
Vol 120 (6) ◽  
pp. 3811-3821 ◽  
Author(s):  
Young S. Kim ◽  
Timothy A. Jones ◽  
Mark E. Chertoff ◽  
William C. Nunnally
Keyword(s):  
Cochlear Microphonic ◽  
Cochlear Microphonic Potential
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