DEVELOPMENTAL-CHANGES OF FREQUENCY REPRESENTATION IN THE RAT COCHLEA

被引：53

作者：

MULLER, M ^{[1
]}

机构：

[1] UNIV FRANKFURT,INST ZOOL,W-6000 FRANKFURT,GERMANY

来源：

HEARING RESEARCH | 1991年 / 56卷 / 1-2期

关键词：

RAT; COCHLEA; DEVELOPMENT; PLACE-FREQUENCY MAP; HRP;

D O I：

10.1016/0378-5955(91)90147-2

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：

The place-frequency map of the developing rat cochlea was measured by iontophoretic HRP-injections into the ventral cochlear nucleus at electrophysiologically characterized positions. Distribution of retrograde HRP transport in cochlear spiral ganglion cells was analysed by means of a three dimensional reconstruction of the cochlea. Cochlear place-frequency maps were derived in rats of two ages groups: 13 to 22 days, and 36/37 day old animals. These maps were compared with the place-frequency map of adult rats (Muller, 1991). No systematic difference in the place-frequency map between 36/37 day old and adult rats was observed. In animals of the younger age group the place-frequency map (for frequencies above 4 kHz) was shifted towards lower frequencies for a given place along the basilar membrane. The morphological and physiological basis for this frequency shift during development is discussed.

引用

页码：1 / 7

页数：7

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