Responses of primate visual cortical V4 neurons to simultaneously presented stimuli
Responses of primate visual cortical V4 neurons to simultaneously presented stimuli
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DOI：
10.1152/jn.2002.88.3.1128
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发表时间：
2002-09-01
影响因子：
2.5
通讯作者：
Martin, JM
中科院分区：
文献类型：
--
作者：
Gawne, TJ;Martin, JM
我们在这里报告的结果，从45灵长类动物V4视皮层神经元的前注意介绍了7个不同的模式，位于两个不同的领域，同一感受野和组合的模式在两个位置。对于许多神经元，我们无法确定对两个同时刺激的反应之间的任何明确关系。然而，对于相当一部分的神经元，我们发现，放电率很好地建模为每个刺激的最大放电率分别提出。以前有人提出，采取最大的输入（“MAX”运算符）可能是一个有用的操作，在视觉皮层的神经元，虽然到目前为止，几乎没有直接的生理证据，这一假设。我们的研究结果直接支持了MAX算子在产生视皮层神经元的感受野特性中起重要作用的假设。
We report here results from 45 primate V4 visual cortical neurons to the preattentive presentations of seven different patterns located in two separate areas of the same receptive field and to combinations of the patterns in the two locations. For many neurons, we could not determine any clear relationship for the responses to two simultaneous stimuli. However, for a substantial fraction of the neurons we found that the firing rate was well modeled as the maximum firing rate of each stimulus presented separately. It has previously been proposed that taking the maximum of the inputs ("MAX" operator) could be a useful operation for neurons in visual cortex, although there has until now been little direct physiological evidence for this hypothesis. Our results here provide direct support for the hypothesis that the MAX operator plays a significant (although certainly not exclusive) role in generating the receptive field properties of visual cortical neurons.