Interaction between Spatial and Feature Attention in Posterior Parietal Cortex.
Interaction between Spatial and Feature Attention in Posterior Parietal Cortex.
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后顶叶皮层空间注意力和特征注意力之间的相互作用。
DOI：
10.1016/j.neuron.2016.07.025
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发表时间：
2016-08-17
期刊：
影响因子：
16.2
通讯作者：
Freedman DJ
中科院分区：
文献类型：
--
作者：
Ibos G;Freedman DJ
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Lateral intraparietal (LIP) neurons encode a vast array of sensory and cognitive variables. Recently, we proposed that the flexibility of feature representations in LIP reflect the bottom-up integration of sensory signals, modulated by feature-based attention (FBA), from upstream feature-selective cortical neurons. Moreover, LIP activity is also strongly modulated by the position of space-based attention (SBA). However, the mechanisms by which SBA and FBA interact to facilitate the representation of task-relevant spatial and non-spatial features in LIP remain unclear. We recorded from LIP neurons during performance of a task which required monkeys to detect specific conjunctions of color, motion-direction, and stimulus position. Here we show that FBA and SBA potentiate each other’s effect in a manner consistent with attention gating the flow of visual information along the cortical visual pathway. Our results suggest that linear bottom-up integrative mechanisms allow LIP neurons to emphasize task-relevant spatial and non-spatial features.