Sheth B R, Sharma J, Rao S C, Sur M
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology (MIT), Cambridge, MA 02139, USA.
Science. 1996 Dec 20;274(5295):2110-5. doi: 10.1126/science.274.5295.2110.
Responses to subjective contours in visual cortical areas V1 and V2 in adult cats were investigated by optical imaging of intrinsic signals and single-unit recording. Both V1 and V2 contain maps of the orientation of subjective gratings that have their basis in specific kinds of neuronal responses to subjective orientations. A greater proportion of neurons in V2 than in V1 show a robust response to subjective edges. Through the use of subjective stimuli in which the orientation of the luminance component is invariant, an unmasked V1 response to subjective edges alone can be demonstrated. The data indicate that the processing of subjective contours begins as early as V1 and continues progressively in higher cortical areas.
通过内在信号的光学成像和单细胞记录，研究了成年猫视觉皮层V1和V2区域对主观轮廓的反应。V1和V2区域都包含主观光栅方向图，这些图基于对主观方向的特定类型神经元反应。与V1区域相比，V2区域中对主观边缘表现出强烈反应的神经元比例更高。通过使用亮度成分方向不变的主观刺激，可以证明V1区域对单独主观边缘的未被掩盖的反应。数据表明，主观轮廓的处理最早始于V1区域，并在更高层次的皮层区域中逐步持续。
