All-or-None Context Dependence Delineates Limits of FEF Visual Target Selection.
All-or-None Context Dependence Delineates Limits of FEF Visual Target Selection.
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全或无上下文依赖性描绘了 FEF 视觉目标选择的限制。
DOI：
10.1016/j.cub.2018.12.013
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Stanford,TerrenceR
中科院分区：
文献类型：
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作者：
Scerra,VeronicaE;Costello,MGabriela;Salinas,Emilio;Stanford,TerrenceR
选择看哪里是由感知判断决定的，它在视觉场景中定位当前有价值或感兴趣的对象。这种感知-运动转换部分是在额视野（FEF）中实现的，在那里，视觉反应神经元似乎选择与行为相关的视觉目标，随后，眼跳相关神经元选择观察这些目标所需的运动。在这里，我们使用紧急决策任务来证明(1)FEF运动活动可以在完全没有FEF视觉反应的目标-分心物区分的情况下指导准确的视觉信息选择；(2)FEF视觉细胞的这种区分完全依赖于与显著性驱动的注意分配密切相关的刺激属性的存在。本研究结果表明，FEF视觉目标选择是基于显著性的视觉判断所特有的，在仅由特征内容决定的跳跃性选择中可能不起重要作用。
Choices of where to look are informed by perceptual judgments, which locate objects of current value or interest within the visual scene. This perceptual-motor transform is partly implemented in the frontal eye field (FEF), where visually responsive neurons appear to select behaviorally relevant visual targets and, subsequently, saccade-related neurons select the movements required to look at them. Here, we use urgent decision-making tasks to show (1) that FEF motor activity can direct accurate, visually informed choices in the complete absence of prior target-distracter discrimination by FEF visual responses and (2) that such discrimination by FEF visual cells shows an all-or-none reliance on the presence of stimulus attributes strongly associated with saliency-driven attentional allocation. The present findings suggest that FEF visual target selection is specific to visual judgments made on the basis of saliency and may not play a significant role in guiding saccadic choices informed solely by feature content.