NEURAL CODING OF VISUAL STIMULI

我们记录了外侧膝状体单个神经元的活动。 初级视觉皮质核(视觉的第一皮质期 处理)和下颞叶皮质(最后一个皮质阶段)，到 研究视觉感知的机制。当回应是 对它们所包含的信息进行分析，我们发现 图案可以表示为几个(3-6)同时的和， 独立的活动模式。这些活动模式被分析为 时间代码，并且该代码包含的信息比 这是通过反应强度来传达的，反应强度是神经元的通常衡量标准 回应。将神经元概念化为具有多个独立的 活动模式允许我们使用由一组 视觉图案来预测由其他图案引发的图案。我们还发现 当猴子记录到的时候，下颞叶皮质神经元 执行特定于刺激的延迟匹配样本任务 区分图案刺激的信息，并反映是否存在 给定的刺激是样本、匹配或不匹配。中国经济的变化 神经元对一些刺激条件的反应可以用来 预测这些神经元对其他刺激反应的变化 条件。下颞叶神经元也携带着关于 当刺激是以下任一项时被搜索的刺激(即样本 匹配或不匹配。使用不同的模型，我们能够展示如何 对被查看的刺激的反应被这些反应所修改 前一次刺激的结果。从记录下来的神经元对中的每个成员 与给定皮质视觉区域中的单个电极同时 独立于另一个，即他们的信息相加。这表明 本地处理是通过添加对 刺激措施正在被看到。

We recorded the activity of single neurons in the lateral geniculate nucleus, primary visual cortex (the first cortical stage of visual processing), and inferior temporal cortex (the last cortical stage), to study the mechanisms underlying visual perception. When the responses were analyzed for the information they contained, we found that the response patterns could be represented as the sum of several (3-6) simultaneous, independent patterns of activity. These activity patterns were analyzed as a temporal code, and this code was found to contain more information than that conveyed by the response strength, the usual measure of neuronal response. Conceptualizing the neuron as having several independent activity patterns allowed us to use the responses elicited by one set of visual patterns to predict those elicited by other patterns. We also found that neurons in inferior temporal cortex recorded from while monkeys perform a delayed matching-to-sample task carry stimulus-specific information differentiating the pattern stimuli, and reflecting whether a given stimulus is the sample, the match, or the nonmatch. The change in the neuronal response across conditions for a few stimuli could be used to predict the change in neuronal response to other stimuli across those same conditions. Inferior temporal neurons also carry information about the stimulus being searched for (i.e. the sample) when the stimulus is either the match or nonmatch. Using a different model we were able to show how the responses to the stimulus being viewed were modified by the responses to the preceding stimulus. Each member of a neuronal pair recorded from simultaneously with a single electrode in a given cortical visual area is independent of the other, i.e., their information adds. This suggests that local processing is carried out by adding independent analyses of the stimulus being viewed.