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首页> 外文期刊>The European Journal of Neuroscience >Saccade execution suppresses discrimination at distractor locations rather than enhancing the saccade goal location
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Saccade execution suppresses discrimination at distractor locations rather than enhancing the saccade goal location

机译：扫视运动的执行可以抑制干扰物位置的歧视，而不是增强扫视目标的位置

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摘要

As we have limited processing abilities with respect to the plethora of visual information entering our brain, spatial selection mechanisms are crucial. These mechanisms result in both enhancing processing at a location of interest and in suppressing processing at other locations; together, they enable successful further processing of locations of interest. It has been suggested that saccade planning modulates these spatial selection mechanisms; however, the precise influence of saccades on the distribution of spatial resources underlying selection remains unclear. To this end, we compared discrimination performance at different locations (six) within a work space during different saccade tasks. We used visual discrimination performance as a behavioral measure of enhancement and suppression at the different locations. A total of 14 participants performed a dual discrimination/saccade countermanding task, which allowed us to specifically isolate the consequences of saccade execution. When a saccade was executed, discrimination performance at the cued location was never better than when fixation was maintained, suggesting that saccade execution did not enhance processing at a location more than knowing the likelihood of its appearance. However, discrimination was consistently lower at distractor (uncued) locations in all cases where a saccade was executed compared with when fixation was maintained. Based on these results, we suggest that saccade execution specifically suppresses distractor locations, whereas attention shifts (with or without an accompanying saccade) are involved in enhancing perceptual processing at the goal location.
机译：由于我们对进入大脑的大量视觉信息的处理能力有限，因此空间选择机制至关重要。这些机制既可以增强感兴趣位置的处理，又可以抑制其他位置的处理。它们一起可以成功地进一步处理感兴趣的位置。有人建议，扫视规划可以调节这些空间选择机制。然而，扫视运动对选择所依据的空间资源分布的确切影响尚不清楚。为此，我们比较了在不同扫视任务期间工作空间中不同位置（六个）的辨别性能。我们使用视觉辨别性能作为在不同位置增强和抑制行为的量度。共有14名参与者执行了双重歧视/扫视打击任务，这使我们能够特别隔离扫视执行的后果。当执行扫视时，在提示位置处的辨别性能永远不会比保持固定时好，这表明执行扫视并不会比知道其出现的可能性更多地增强处理。但是，与保持固定状态相比，在所有进行扫视的情况下，在牵张物（无提示）位置的辨别率始终较低。根据这些结果，我们建议扫视运动的执行可以具体抑制干扰因素的位置，而注意力转移（有或没有陪伴的扫视运动）则涉及增强目标位置的感知能力。

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