Perceptual decision making in less than 30 milliseconds.

Perceptual decision making in less than 30 milliseconds.
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DOI:
10.1038/nn.2485
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发表时间:
2010-03
影响因子:
25
通讯作者:
Salinas, Emilio
Salinas, Emilio
中科院分区:
医学1区
文献类型:
--
作者:
Stanford, Terrence R.;Shankar, Swetha;Massoglia, Dino P.;Costello, M. Gabriela;Salinas, Emilio

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在知觉辨别任务中,被试的反应时间是由感觉和运动过程共同决定的。因此,由于运动准备、任务难度和速度-准确性权衡等因素,测量知觉评估步骤所消耗的时间变得复杂。在这里,我们提出了一种任务设计,可以最大限度地减少这些混淆,并允许我们以前所未有的时间分辨率跟踪受试者的感知表现。我们发现猴子可以在不到30毫秒的时间内做出准确的颜色辨别。此外,我们的简单任务设计为阐明神经元活动与感觉和运动加工之间的关系提供了一种新的工具,正如来自皮层动眼神经细胞的神经数据所证明的那样。在这些细胞中,感知信息通过加速和减速与正确和不正确选择相关的正在进行的运动计划来起作用,正如竞赛-阈值模型所预测的那样,这些神经事件的时间过程与受试者选择准确性的时间过程平行。
In perceptual discrimination tasks, a subject’s response time is determined both by sensory and motor processes. Measuring the time consumed by the perceptual evaluation step alone is thus complicated by factors such as motor preparation, task difficulty and speed-accuracy tradeoffs. Here we present a task design that minimizes these confounds and allows us to track a subject’s perceptual performance with unprecedented temporal resolution. We find that monkeys can make accurate color discriminations in less than 30 ms. Furthermore, our simple task design provides a novel tool for elucidating how neuronal activity relates to sensory versus motor processing, as demonstrated with neural data from cortical oculomotor neurons. In these cells, perceptual information acts by accelerating and decelerating the ongoing motor plans associated with correct and incorrect choices, as predicted by a race-to-threshold model, and the time course of these neural events parallels the time course of the subject's choice accuracy.
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