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首页> 外文期刊>Neuron >Sensing without touching: psychophysical performance based on cortical microstimulation.
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Sensing without touching: psychophysical performance based on cortical microstimulation.

机译：无需触摸即可感知：基于皮层微刺激的心理生理表现。

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摘要

Unequivocal proof that the activity of a localized cortical neuronal population provides sufficient basis for a specific cognitive function has rarely been obtained. We looked for such proof in monkeys trained to discriminate between two mechanical flutter stimuli applied sequentially to the fingertips. Microelectrodes were inserted into clusters of quickly adapting (QA) neurons of the primary somatosensory cortex (S1), and the first or both stimuli were then substituted with trains of current pulses during the discrimination task. Psychophysical performance with artificial stimulus frequencies was almost identical to that measured with the natural stimulus frequencies. Our results indicate that microstimulation can be used to elicit a memorizable and discriminable analog range of percepts, and shows that activation of the QA circuit of S1 is sufficient to initiate all subsequent neural processes associated with flutter discrimination.
机译：很少获得明确的证据表明局部皮质神经元群体的活动为特定的认知功能提供了足够的基础。我们在受过训练的猴子中寻找这种证据，以区分两个顺序施加于指尖的机械扑动刺激。将微电极插入初级体感皮层（S1）的快速适应（QA）神经元的簇中，然后在区分任务期间用电流脉冲序列代替第一个或两个刺激。人工刺激频率下的心理物理性能几乎与自然刺激频率下的相同。我们的结果表明，微刺激可用于引起记忆的和可辨别的类似的感知范围，并显示S1的QA电路的激活足以引发所有与颤动识别相关的神经过程。

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