Perceptual filling-in from the edge of the blind spot
Perceptual filling-in from the edge of the blind spot
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DOI：
10.1016/j.visres.2006.08.033
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发表时间：
2006-11-01
期刊：
影响因子：
1.8
通讯作者：
Magnussen, Svein
中科院分区：
文献类型：
--
作者：
Spillmann, Lothar;Otte, Tobias;Magnussen, Svein
用一只眼睛看世界，我们没有注意到视神经离开眼睛的视野无感受器区域有盲点。相反，我们感知邻近区域的亮度、颜色和纹理，就好像它们实际上就在那里一样。这种知觉填充背后的机制仍然存在争议。为了更好地理解这些过程，我们确定了盲点周围需要刺激填补的最小区域，方法是仔细绘制盲点图，并在盲点周围呈现单独拟合的不同宽度的刺激帧。观察到均匀填充，框宽窄至0.05度视角(颜色)和0.2度(纹理)。由于眼球运动，当帧不再与盲点边界相邻时，填充是不完整的。这些结果与盲点的知觉填充取决于在皮质表征的生理边缘产生的局部过程的想法是一致的。(C)2006爱思唯尔有限公司。保留所有权利。
Looking at the world with one eye, we do not notice a scotoma in the receptor-free area of the visual field where the optic nerve leaves the eye. Rather we perceive the brightness, color, and texture of the adjacent area as if they were actually there. The mechanisms underlying this kind of perceptual filling-in remain controversial. To better understand these processes, we determined the minimum region around the blind spot that needs to be stimulated for filling-in by carefully mapping the blind spot and presenting individually fitted stimulus frames of different width around it. Uniform filling-in was observed with frame widths as narrow as 0.05 degrees visual angle for color and 0.2 degrees for texture. Filling-in was incomplete, when the frame was no longer contiguous with the blind spot border due to an eye movement. These results are consistent with the idea that perceptual filling-in of the blind spot depends on local processes generated at the physiological edge of the cortical representation. (c) 2006 Elsevier Ltd. All rights reserved.