Visual responses to targets and distracters by inferior temporal neurons after lesions of extrastriate areas V4 and TEO
Visual responses to targets and distracters by inferior temporal neurons after lesions of extrastriate areas V4 and TEO
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DOI：
10.1097/01.wnr.0000134847.86625.15
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发表时间：
2004-07-19
期刊：
影响因子：
1.7
通讯作者：
Ungerleider, LG
中科院分区：
文献类型：
--
作者：
Bertini, G;Buffalo, EA;Ungerleider, LG
虽然视觉区域 V4 和 TEO 的损伤仅轻微影响对孤立物体的辨别，但它们会严重损害选择性关注被干扰物包围的物体的能力。为了测试这种缺陷是否是由高阶区域输入丢失造成的，我们在去除猴子中的 V4 和 TEO 部分后记录了 TE 神经元区域。对受病变影响的视觉象限中孤立目标的反应基本保留，这表明即使在移除主要输入源后，TE 仍然接收信息。与正常象限相比，干扰物在受病变影响的象限中更多地增加或减少对目标的反应，这支持了 V4 和/或 TEO 是自上而下的注意力输入过滤干扰刺激的位置的观点。
While lesions of visual areas V4 and TEO only modestly affect discrimination of isolated objects, they significantly impair the ability to selectively attend to an object surrounded by distracters. To test whether such deficits result from a loss of inputs to higher order areas, we recorded from area TE neurons after removing portions of V4 and TEO in a monkey. Responses to isolated targets in a lesion-affected visual quadrant were substantially preserved, indicating that TE still receives information even after removing a major source of input. Distracters increased or decreased the response to targets more in the lesion-affected than in the normal quadrant, supporting the idea that V4 and/or TEO are sites where top-down attentional inputs filter out distracting stimuli.