Figure-ground interaction in the human visual cortex.
Figure-ground interaction in the human visual cortex.
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DOI：
10.1167/8.9.8
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发表时间：
2008-07-18
影响因子：
1.8
通讯作者：
Norcia AM
中科院分区：
文献类型：
--
作者：
Appelbaum LG;Wade AR;Pettet MW;Vildavski VY;Norcia AM
特征图中的不连续性是物体边界位置的重要线索。在这里，我们使用多输入非线性分析方法和EEG源成像评估的作用，几个不同的边界线索在视觉场景分割。描绘圆形图形区域的合成图形/地面显示器仅由图形和背景区域的时间频率的差异在限制情况下定义，并且在其他情况下通过添加方向或相对对齐提示来定义。不同的时间频率的使用使得有可能分别记录从每个区域产生的响应，并表征两个区域之间的非线性相互作用的性质，如在一组retinotopically和功能定义的皮层区域中测量的。图/背景的相互作用是突出的retinotopic地区，并在一个额外的纹状区域躺背侧和前部的MT+区。图/背景的相互作用大大减少了方向线索的消除，两个区域之间的小间隙的引入，或由一个恒定的二阶边界区域之间的存在。因此，非线性的图形/背景的相互作用进行空间上精确的，时间锁定的信息的连续性/不连续性的定向纹理字段。这种信息广泛分布在整个枕骨区域，包括不显示强烈视网膜病变的区域。
Discontinuities in feature maps serve as important cues for the location of object boundaries. Here we used multi-input nonlinear analysis methods and EEG source imaging to assess the role of several different boundary cues in visual scene segmentation. Synthetic figure/ground displays portraying a circular figure region were defined solely by differences in the temporal frequency of the figure and background regions in the limiting case and by the addition of orientation or relative alignment cues in other cases. The use of distinct temporal frequencies made it possible to separately record responses arising from each region and to characterize the nature of nonlinear interactions between the two regions as measured in a set of retinotopically and functionally defined cortical areas. Figure/background interactions were prominent in retinotopic areas, and in an extra-striate region lying dorsal and anterior to area MT+. Figure/background interaction was greatly diminished by the elimination of orientation cues, the introduction of small gaps between the two regions, or by the presence of a constant second-order border between regions. Nonlinear figure/background interactions therefore carry spatially precise, time-locked information about the continuity/discontinuity of oriented texture fields. This information is widely distributed throughout occipital areas, including areas that do not display strong retinotopy.
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影响因子：
5.7
作者：
Marcar, VL;Loenneker, T;Martin, E
通讯作者：
Martin, E
影响因子：
5.3
作者：
Kourtzi, Z;Kanwisher, N
通讯作者：
Kanwisher, N
DOI：
10.1348/000711001159357
发表时间：
2001-05-01
影响因子：
2.6
作者：
Keselman, HJ;Algina, J;Kowalchuk, RK
通讯作者：
Kowalchuk, RK
影响因子：
1.9
作者：
Koechlin, E;Anton, JL;Burnod, Y
通讯作者：
Burnod, Y
影响因子：
1.8
作者：
LAMME, VAF;VANDIJK, BW;SPEKREIJSE, H
通讯作者：
SPEKREIJSE, H