Effects of similarity and history on neural mechanisms of visual selection
Effects of similarity and history on neural mechanisms of visual selection
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DOI：
10.1038/9205
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发表时间：
1999-06-01
影响因子：
25
通讯作者：
Schall, JD
中科院分区：
文献类型：
--
作者：
Bichot, NP;Schall, JD
为了研究大脑如何结合知识和视觉处理来定位眼球运动目标，我们训练猴子寻找由颜色和形状结合定义的目标。在成功的实验中，额叶视野的神经元不仅能区分目标和干扰物，还能区分具有目标特征的干扰物以及在前一阶段中作为搜索目标的干扰物。同样，偶尔的扫视也会将注意力引向与当前目标相似或曾经是之前目标的干扰物。这些发现表明，额叶视野不仅参与运动选择，还参与视觉选择，并且视觉选择受长期启动的影响。这些数据支持了视觉选择可以通过基于基本特征的对象并行处理来完成的假设。
To investigate how the brain combines knowledge with visual processing to locate eye movement targets, we trained monkeys to search for a target defined by a conjunction of color and shape. On successful trials, neurons in the frontal eye field not only discriminated the target from distracters, but also discriminated distracters that shared a target feature as well as distracters that had been the search target during the previous session. Likewise, occasional errant saccades tended to direct gaze to distracters that either resembled the current target or had been the previous target. These findings show that the frontal eye field is involved in visual and not just motor selection and that visual selection is influenced by long-term priming. The data support the hypothesis that visual selection can be accomplished by parallel processing of objects based on their elementary features.