SINGLE-UNIT ACTIVITY IN THE AUDITORY-CORTEX OF MONKEYS ACTIVELY LOCALIZING SOUND SOURCES - SPATIAL TUNING AND BEHAVIORAL DEPENDENCY
SINGLE-UNIT ACTIVITY IN THE AUDITORY-CORTEX OF MONKEYS ACTIVELY LOCALIZING SOUND SOURCES - SPATIAL TUNING AND BEHAVIORAL DEPENDENCY
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DOI：
10.1016/0006-8993(81)90290-0
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发表时间：
1981-01-01
期刊：
影响因子：
2.9
通讯作者：
GOLDSTEIN, MH
中科院分区：
文献类型：
--
作者：
BENSON, DA;HIENZ, RD;GOLDSTEIN, MH
单单位录音是从未经麻醉的恒河猴的听觉皮层进行训练，以执行声音定位任务。记录了4只动物的196个单位。5个声源位于0 °。（中线）和在37.5 °方位角的任一侧上。和75度。虽然大多数装置对5个源中的每一个都有响应，但49%的装置在75 °时对侧源的峰值击发率。方位角另外26%的单元在37.5 °处具有峰值发射率。对侧位置，而只有11%的同侧位置的峰值率。为了确定主动定位声源的行为是否会影响听觉皮层的单位，在两种行为条件下比较了反应率;一种是需要检测声音而不管位置，另一种是需要识别声音的位置。在196个单位中，16个单位对2种条件有不同的反应率，其中15个单位在定位任务中具有较高的诱发率。对于16个单元，通常仅在单个扬声器位置观察到放电率的差异。没有相关性可以确定一个单位的位置在听觉皮层的细分和它的空间调谐响应特性或依赖于行为条件。
Single-unit recordings were made from the auditory cortex of unanesthetized rhesus monkeys trained to perform a sound localization task. Recordings were made from 196 units in 4 animals. Five sound sources were located at 0.degree. (midline) and on either side at azimuths of 37.5.degree. and 75.degree.. Although most units responded to each of the 5 sources, 49% of the units had peak firing rates for the source on the contralateral side at 75.degree. azimuth. Another 26% of the units had peak firing rates at the 37.5.degree. contralateral location, while only 11% had peak rates for the ipsilateral locations. To determine whether the behavior of actively locating a sound source affected units in auditory cortex, response rates were compared under 2 behavioral conditions; one which required the detection of a sound regardless of location and another condition which required identification of a sound''s location. Of the 196 units, 16 had different response rates for the 2 conditions, with 15 of 16 units having higher evoked rates in the localization task. For the 16 units, the difference in firing rate was typically observed only for a single speaker location. No correlation could be determined between a unit''s location within the subdivisions of auditory cortex and its spatial tuning response properties or its dependency upon behavioral condition.