AXONAL DELAY-LINES FOR TIME MEASUREMENT IN THE OWLS BRAIN-STEM
AXONAL DELAY-LINES FOR TIME MEASUREMENT IN THE OWLS BRAIN-STEM
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DOI：
10.1073/pnas.85.21.8311
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发表时间：
1988-11-01
影响因子：
11.1
通讯作者：
KONISHI, M
中科院分区：
文献类型：
--
作者：
CARR, CE;KONISHI, M
耳际时差是声音定位的重要线索。在仓鸮（Tyto alba）中，神经元对这种差异的敏感性源自脑干层状核。来自同侧和对侧大细胞耳蜗层状核的传入信号分别通过其背侧和腹侧表面，并在核内交错。这些传入事件的细胞内记录显示，传导延迟随细胞核深度的变化而有序变化。这些变化与猫头鹰所能获得的内在时差范围相当。因此，这些传入轴突作为延迟线，为层状核耳间时差的神经元图提供了解剖生理学基础。
Interaural time difference is an important cue for sound localization. In the barn owl (Tyto alba) neuronal sensitivity to this disparity originates in the brainstem nucleus laminaris. Afferents from the ipsilateral and contralateral magnocellular cochlear nucleus laminaris through its dorsal and ventral surfaces, respectively, and interdigitate in the nucleus. Intracellular recordings form these afferents show orderly changes in conduction delay with depth in the nucleus. These changes are comparable to the range of interaural time differences available to the owl. Thus, these afferent axons act as delay lines and provide anatomical physiological bases for a neuronal map of interaural time differences in the nucleus laminaris.