ABSENCE OF TONIC ACTIVITY OF THE CROSSED OLIVOCOCHLEAR BUNDLE IN DETERMINING COMPOUND ACTION-POTENTIAL THRESHOLDS, AMPLITUDES AND MASKING PHENOMENA IN ANESTHETIZED GUINEA-PIGS WITH NORMAL HEARING SENSITIVITIES

被引：20

作者：

RAJAN, R ^{[1
]}

ROBERTSON, D ^{[1
]}

JOHNSTONE, BM ^{[1
]}

机构：

[1] UNIV WESTERN AUSTRALIA,DEPT PHYSIOL,PERTH,WA,AUSTRALIA

来源：

HEARING RESEARCH | 1990年 / 44卷 / 2-3期

基金：

英国医学研究理事会;

关键词：

CAP tuning curves; Crossed olivocochlear bundle; Guinea pigs; Masking; N[!sub]1[!/sub] audiograms; Transection;

D O I：

10.1016/0378-5955(90)90080-9

中图分类号：

R36 [病理学]; R76 [耳鼻咽喉科学];

学科分类号：

100104 ; 100213 ;

摘要：

In Nembutal- or Urethane-anaesthetised guinea pigs A N1 audiograms and N1 input-output functions were measured as were compound action potential (CAP) tuning curves under forward masking and simultaneous masking conditions. Then the crossed olivocochlear bundle was lesioned at the floor of the fourth ventricle and the cochlear responses were re-measured. There were never any changes in the N1 audiograms, input-output functions, or the CAP tuning curves. Thus, the crossed efferent pathways do not appear to play any tonic role in determining cochlear threshold sensitivities, selectivities or masking phenomena in anaesthetised guinea pigs with normal hearing sensitivities. © 1990.

引用

页码：195 / 207

页数：13

共 57 条

[1] 2-TONE SUPPRESSION IN AUDITORY-NERVE FIBERS - EXTENSION OF A STIMULUS-RESPONSE RELATIONSHIP [J].