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首页> 外文期刊>Journal of Neurophysiology >Attention and memory-related responses of neurons in the lateral intraparietal area during spatial and shape-delayed match-to-sample tasks.
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Attention and memory-related responses of neurons in the lateral intraparietal area during spatial and shape-delayed match-to-sample tasks.

机译：在空间和形状延迟的匹配样本任务中，顶壁外侧区域神经元的注意力和记忆相关反应。

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摘要

When a monkey attends to, remembers, and looks toward targets, the activity of some neurons in the lateral intraparietal area (LIP) changes. We recorded from isolated neurons during both a spatial and a shape match-to-sample task to examine and characterize voluntary active processes in LIP. Many LIP neurons show spatially selective activity during the delay period that depends on the location of the sample, but for most cells, this activity does not differ between the two tasks. Although much past work in posterior parietal cortex has explained responses in this region in terms of active processes such as decision-making and motor planning, our findings suggest that much of that activity represents more passive processing. Nevertheless, we do see a significant minority of units that demonstrate instruction-dependent activity during the delay period, suggesting that these units could represent the neural correlates of voluntary or active processes. Separately, we found that during the presentation of the sample stimulus and test array, some units show stronger responses to the stimulus in the shape-matching task when the animal must attend to the shape of a stimulus. This elevated response to the sample during the shape task provides evidence for feature-based attention in LIP. Attention to shape is a property that has not previously been described in primate cortex.
机译：当猴子照看，记住并朝目标方向移动时，顶顶外侧区域（LIP）中某些神经元的活动会发生变化。我们在空间和形状匹配样本任务中从孤立的神经元记录下来，以检查和表征LIP中的主动活动过程。许多LIP神经元在延迟期间显示出空间选择性的活动，这取决于样品的位置，但是对于大多数细胞而言，这两项任务之间的活动没有不同。尽管过去在顶叶后皮质的许多工作已经从主动过程（例如决策和运动计划）方面解释了该区域的反应，但我们的发现表明，大部分活动代表了更多的被动过程。但是，我们确实看到了少数在延迟期内表现出指令依赖性活动的单元，这表明这些单元可以代表自愿或主动过程的神经相关性。单独地，我们发现在演示刺激和测试阵列的过程中，当动物必须注意刺激的形状时，某些单元在形状匹配任务中显示出对刺激的更强响应。形状任务期间对样品的这种升高的响应为LIP中基于特征的关注提供了证据。注意形状是灵长类动物皮层中以前没有描述的特性。

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