Frequency-specific effects on cochlear responses during activation of the inferior colliculus in the Guinea pig.
Frequency-specific effects on cochlear responses during activation of the inferior colliculus in the Guinea pig.
复制标题
豚鼠下丘激活过程中频率对耳蜗反应的影响。
DOI：
10.1152/jn.01155.2003
复制
发表时间：
2004
影响因子：
2.5
通讯作者：
Dolan,DF
中科院分区：
文献类型：
--
作者：
Ota,Y;Oliver,DL;Dolan,DF
The inferior colliculus (IC) is a major processing center in the ascending auditory pathway. The role of the IC in the descending efferent auditory system is less clear. Although the IC central nucleus (ICC) is the major relay station for the ascending auditory pathways, the IC's cortex receives its main input from the neocortex and nonauditory sources. The goal of this study was to determine if the IC subdivisions had different functions in the descending efferent auditory system. IC subdivisions were identified by their tuning curves evoked by tone stimulation, and the effects of localized electrical stimulation on the cochlear whole-nerve action potential (CAP). Sharp tuning curves were obtained from ICC in contrast to broad tuning curves from the lateral, external cortex. Electrical stimulation within the central nucleus had a sharply tuned effect on the CAP. The frequency region affected within the cochlea closely matched the best frequency of local cells within the central nucleus. The effect of electrical stimulation within the lateral, external cortex on the CAP was smaller in comparison to central nucleus stimulation. Similar to the broad tuning of cells within the lateral cortex, electrical stimulation had a broad frequency effect on CAP thresholds.
