EVOKED UNIT-ACTIVITY IN AUDITORY-CORTEX OF MONKEYS PERFORMING A SELECTIVE ATTENTION TASK
EVOKED UNIT-ACTIVITY IN AUDITORY-CORTEX OF MONKEYS PERFORMING A SELECTIVE ATTENTION TASK
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DOI：
10.1016/0006-8993(76)90555-2
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发表时间：
1976-01-01
期刊：
影响因子：
2.9
通讯作者：
HEINZ, RD
中科院分区：
文献类型：
--
作者：
HOCHERMAN, S;BENSON, DA;HEINZ, RD
单单位的反应记录从听觉皮层的恒河猴[猕猴]执行选择性注意任务，使用组合的光和声音刺激。动物们首先被训练向左推一个杠杆来发出噪音，向右推一个杠杆来发出声音，然后被训练向左推一个杠杆来发出左边的光，向右推一个杠杆来发出右边的光。随后，在每次试验中随机呈现4种可能的光和声音刺激组合（噪声+左光、噪声+右光、音调+左光、音调+右光）中的1种。在100次试验中，只有一部分组合刺激（光或声音）决定了杠杆推动的方向，这将得到加强。单一单位相同的声音刺激的反应进行了比较，在块中，声音是相关的线索和块中，光是相关的线索。通常情况下，反应强度的差异没有改变反应模式。即使是最早的反应成分（15-20 ms的潜伏期）也可能出现变化。在反应比较中，2/3的人表现出强度的差异，这取决于声音或光是相关线索，光相关的反应与声音相关的反应一样强。独立的方式是相关的，单元反应的试验中，这两个部分的组合光和声音刺激指示相同的方向的杠杆推动一般比单元反应的试验中，这两个部分的组合刺激信号相反方向的杠杆推动。
Single-unit responses were recorded from the auditory cortex of rhesus monkeys [Macaca mulatta] performing a selective attention task which used combined light and sound stimuli. The animals were first trained to push a lever to the left for a noise burst and to the right for a tone burst, and then trained to push left for a left light and right for a right light. Subsequently, 1 of the 4 possible light and sound stimulus combinations (Noise + Left Light, Noise + Right Light, Tone + Left Light, Tone + Right Light) was randomly presented on each trial. In blocks of 100 trials only 1 part of the combined stimulus (either the light or the sound) determined the direction of lever push that would be reinforced. Responses of single units to identical sound stimuli were compared for blocks in which sound was the relevant cue and blocks in which light was the relevant cue. Typically, differences were in response strength without alteration of response pattern. Even the earliest response components (15-20 ms latency) could show changes. Of the response comparisons, 2/3 showed differences in strength depending upon whether sound or light was the relevant cue, with about as many responses stronger for light relevant as for sound relevant. Independent of which modality was relevant, unit responses for trials in which both parts of the combined light and sound stimulus indicated the same direction of lever push were generally stronger than unit responses for trials in which the 2 parts of the combined stimulus signalled opposite directions of lever pushes.