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首页> 外文期刊>Neuron >One-dimensional dynamics of attention and decision making in LIP.
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One-dimensional dynamics of attention and decision making in LIP.

机译:LIP中注意力和决策的一维动力学。

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摘要

Where we allocate our visual spatial attention depends upon a continual competition between internally generated goals and external distractions. Recently it was shown that single neurons in the macaque lateral intraparietal area (LIP) can predict the amount of time a distractor can shift the locus of spatial attention away from a goal. We propose that this remarkable dynamical correspondence between single neurons and attention can be explained by a network model in which generically high-dimensional firing-rate vectors rapidly decay to a single mode. We find direct experimental evidence for this model, not only in the original attentional task, but also in a very different task involving perceptual decision making. These results confirm a theoretical prediction that slowly varying activity patterns are proportional to spontaneous activity, pose constraints on models of persistent activity, and suggest a network mechanism for the emergence of robust behavioral timing from heterogeneous neuronal populations.
机译:我们分配视觉空间注意力的位置取决于内部产生的目标与外部干扰之间的持续竞争。最近显示,猕猴外侧顶壁内区域(LIP)中的单个神经元可以预测干扰物将空间注意力从目标移开的时间。我们提出,单个神经元和注意力之间的这种显着的动态对应关系可以通过网络模型来解释,在该网络模型中,一般的高维点火速率矢量会迅速衰减为单个模式。我们不仅在最初的注意力任务中,而且在涉及感知决策的非常不同的任务中,也找到了该模型的直接实验证据。这些结果证实了理论上的预测,即缓慢变化的活动模式与自发活动成正比,对持续活动的模型构成约束,并提出了从异质神经元群体中出现稳健的行为时机的网络机制。

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