Analysis of perceptual processing of ambiguity and context in three-dimensional form perception.

本研究旨在探讨三维形式知觉中歧义和语境的知觉过程，并寻找这些知觉过程的神经关联。为此，我们绘制了形状感知的大脑位点，使用了一个模糊的Necker立方体模式。我们发现，当受试者被动地观看描绘立方体的三维图案时，人类视觉皮层中有六个激活区域。我们的fMRI数据显示腹侧、枕颞和顶叶皮层的不同作用：枕颞皮层可能介导知觉组织，而腹侧皮层可能与知觉分类有关；顶叶皮层的上、下半部分可能隶属于知觉，但作用不同。为了进一步评估人类视觉皮层视觉区域的规格，我们研究了纹状和纹状外皮层的视网膜切除。

The present study aimed to investigate the perceptual processes for resolving ambiguity and context in three-dimensional form perception, and find neural correlates for these perceptual processes. For this purpose, we mapped the brain loci of form perception, with using an ambiguous pattern of Necker Cube. We identified six activated regions in human visual cortex when subjects passively viewed three dimensional patterns depicting a cube.Our fMRI data suggested different roles of ventral, occipito-temporal and parietal cortex : occipito-temporal cortex may mediated perceptual organization, while ventral cortex may be related to perceptual categorization ; Inferior and superior parts in parietal cortex may subserve form perception but play different roles. In order to further assess the specification of visual areas in human visual cortex, we investigated the retinotopy of striate and extrastriate cortex.