Orban Guy A, Janssen Peter, Vogels Rufin
Laboratorium voor Neuro- en Psychofysiologie, K.U. Leuven, Medical School, Campus Gasthuisberg, Herestraat 49/1021, BE-3000 Leuven, Belgium.
Trends Neurosci. 2006 Aug;29(8):466-73. doi: 10.1016/j.tins.2006.06.012. Epub 2006 Jul 13.
The neural mechanisms of stereoscopic 3D shape perception have only recently been investigated. Here we review the two cortical regions in which these mechanisms have been studied so far in macaques: a small subpart of inferotemporal cortex called TEs, and the caudal intraparietal (CIP) region. Neurons in TEs respond selectively to the orientation and curvature in depth of stereoscopic surfaces and this region provides a detailed 3D shape description of surface boundaries and surface content. This description is evoked only by binocular stimuli in which subjects see depth and it does not vary if depth is specified by different cues. Neurons in CIP are a selective for orientation in depth of surfaces and elongated objects, and their responses are also unaffected by changes in depth cues. Thus, stereoscopic 3D shape is processed in both the dorsal, occipito-parietal and the ventral, occipito-temporal streams.
立体三维形状感知的神经机制直到最近才得到研究。在此，我们回顾一下迄今为止在猕猴中研究过这些机制的两个皮质区域：颞下皮质的一个小部分，称为TEs，以及顶内尾侧（CIP）区域。TEs中的神经元对立体表面深度的方向和曲率有选择性反应，该区域提供了表面边界和表面内容的详细三维形状描述。这种描述仅由受试者能看到深度的双眼刺激引发，并且如果深度由不同线索指定，它不会改变。CIP中的神经元对表面和细长物体深度的方向具有选择性，并且它们的反应也不受深度线索变化的影响。因此，立体三维形状在背侧枕顶叶和腹侧枕颞叶通路中都得到处理。
