猫后听觉丘脑的方位处理
Azimuthal processing in the posterior auditory thalamus of cats.
作者信息
Aitkin L, Jones R
机构信息
Department of Physiology, Monash University, Melbourne, Australia.
出版信息
Neurosci Lett. 1992 Aug 3;142(1):81-4. doi: 10.1016/0304-3940(92)90625-h.
The responses to free-field acoustic stimuli of 157 units in the auditory thalamus of anesthetized cats were studied in relation to the localization of pure tone stimuli in the azimuthal plane. Units were classified as 'directional' if their firing rates at sound levels in excess of 20 dB above threshold varied by more than 50% as a function of azimuth. Sixty-five % of the units in the nucleus of the brachium of the inferior colliculus and 30% in the ventral division of the medial geniculate body were found to be directional, suggesting different processing channels for sound localization between colliculus and cortex.
研究了麻醉猫听觉丘脑157个单位对自由场声刺激的反应，这些反应与纯音刺激在方位平面上的定位有关。如果单位在超过阈值20 dB的声级下的放电率随方位变化超过50%，则将其分类为“定向的”。结果发现，下丘臂核中65%的单位和内侧膝状体腹侧部中30%的单位是定向的，这表明在丘和皮层之间存在不同的声音定位处理通道。
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