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首页> 外文期刊>Progress in brain research >Saccades, salience and attention: the role of the lateral intraparietal area in visual behavior.
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Saccades, salience and attention: the role of the lateral intraparietal area in visual behavior.

机译：扫视，显眼和注意：侧顶壁区在视觉行为中的作用。

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摘要

Neural activity in the lateral intraparietal area (LIP) has been associated with attention to a location in visual space, and with the intention to make saccadic eye movement. In this study we show that neurons in LIP respond to recently flashed task-irrelevant stimuli and saccade targets brought into the receptive field by a saccade, although they respond much to the same stimuli when they are stable in the environment. LIP neurons respond to the appearance of a flashed distractor even when a monkey is planning a memory-guided delayed saccade elsewhere. We then show that a monkey's attention, as defined by an increase in contrast sensitivity, is pinned to the goal of a memory-guided saccade throughout the delay period, unless a distractor appears, in which case attention transiently moves to the site of the distractor and then returns to the goal of the saccade. LIP neurons respond to both the saccade goal and the distractor, and this activity correlates with the monkey's locus of attention. In particular, the activity of LIP neurons predicts when attention migrates from the distractor back to the saccade goal. We suggest that the activity in LIP provides a salience map that is interpreted by the oculomotor system as a saccade goal when a saccade is appropriate, and simultaneously is used by the visual system to determine the locus of attention.
机译：顶叶外侧区域（LIP）的神经活动与对视觉空间位置的关注有关，并与眼球运动有关。在这项研究中，我们表明LIP中的神经元对最近闪烁的与任务无关的刺激和扫视运动所引起的扫视目标产生了反应，尽管当它们在环境中稳定时，它们会对相同的刺激做出很大反应。即使猴子计划在其他地方进行记忆引导的延迟扫视，LIP神经元也会对闪烁的干扰物的出现做出反应。然后，我们表明，由对比度敏感度增加所定义的猴子的注意力在整个延迟期内都固定在记忆引导扫视的目标上，除非出现干扰物，在这种情况下，注意力会暂时移至干扰物的位置然后返回到扫视目标。 LIP神经元对扫视目标和干扰物都有反应，而这种活动与猴子的注意力轨迹有关。特别是，LIP神经元的活动可预测注意力何时从干扰物迁移回扫视目标。我们建议LIP中的活动提供一个显着图，当扫视适当时，动眼系统会将其解释为扫视目标，并且视觉系统同时使用它来确定注意点。

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