The representation of visual salience in monkey parietal cortex
The representation of visual salience in monkey parietal cortex
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DOI：
10.1038/35135
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发表时间：
1998-01-29
期刊：
影响因子：
64.8
通讯作者：
Goldberg, ME
中科院分区：
文献类型：
--
作者：
Gottlieb, JP;Kusunoki, M;Goldberg, ME
当观看自然场景时，大量在其环境中稳定的对象通过眼球运动被带进和带出视线。顶叶后皮质对于空间、视觉注意力和运动的分析至关重要(1)。它的一个分支，外侧顶内区(LIP)的神经元对突然出现在特定视网膜位置(它们的感受野)的刺激有视觉反应(2)。我们休息了嘴唇神经元对通过眼跳进入其接受视野的刺激的反应。神经元对眼跳进入其感受野的刺激反应很少或没有反应，除非这些刺激在行为上意义重大。我们通过两种方式确立了行为重要性：一种是使稳定的刺激与任务相关，另一种是利用突然出现的刺激的注意力吸引力。我们的结果表明，在正常情况下，整个视觉世界只能在嘴唇上微弱地表现出来。嘴唇的视觉表现是稀疏的，只有最显著或与行为相关的物体才被强烈地表现出来。
When natural scenes are viewed, a multitude of objects that are stable in their environments are brought in and out of view by eye movements. The posterior parietal cortex is crucial for the analysis of space, visual attention and movement(1). Neurons in one of its subdivisions, the lateral intraparietal area (LIP), have visual responses to stimuli appearing abruptly at particular retinal locations (their receptive fields)(2). We have rested the responses of LIP neurons to stimuli that entered their receptive field by saccades. Neurons had little or no response to stimuli brought into their receptive field by saccades, unless the stimuli were behaviourally significant. We established behavioural significance in two ways: either by making a stable stimulus task-relevant, or by taking advantage of the attentional attraction of an abruptly appearing stimulus. Our results show that under ordinary circumstances the entire visual world is only weakly represented in LIP. The visual representation in LIP is sparse, with only the most salient or behaviourally relevant objects being strongly represented.