De Weerd P, Desimone R, Ungerleider L G
Laboratory of Psychology and Psychopathology, NIMH, NIH, Bethesda, MD 20892-4415, USA.
Vis Neurosci. 1996 May-Jun;13(3):529-38. doi: 10.1017/s0952523800008208.
To examine the role of visual area V4 in pattern vision, we tested two monkeys with lesions of V4 on tasks that required them to discriminate the orientation of contours defined by several different cues. The cues used to separate the contours from their background included luminance, color, motion, and texture, as well as phase-shifted abutting gratings that created an "illusory" contour. The monkeys were trained to maintain fixation on a fixation target while discriminating extrafoveal stimuli, which were located in either a normal control quadrant of the visual field or in a quadrant affected by a lesion of area V4 in one hemisphere. Comparing performance in the two quadrants, we found significant deficits for contours defined by texture and for the illusory contour, but smaller or no deficits for motion-, color-, and luminance-defined contours. The data suggest a specific role of V4 in the perception of illusory contours and contours defined by texture.
为了研究视觉区域V4在图案视觉中的作用，我们对两只患有V4区损伤的猴子进行了测试，测试任务要求它们辨别由几种不同线索定义的轮廓的方向。用于将轮廓与背景分离的线索包括亮度、颜色、运动和纹理，以及产生“虚幻”轮廓的相移邻接光栅。猴子经过训练，在辨别位于视野正常对照象限或受一侧半球V4区损伤影响的象限中的中央凹外刺激时，保持对固定目标的注视。比较两个象限中的表现，我们发现由纹理定义的轮廓和虚幻轮廓存在显著缺陷，但由运动、颜色和亮度定义的轮廓缺陷较小或没有缺陷。数据表明V4在虚幻轮廓和由纹理定义的轮廓的感知中具有特定作用。
