The Brain and Mind Institute, The University of Western Ontario, London, ON N6A 5B7, Canada.
Department of Psychology, University of Nevada, Reno, 1664 N. Virginia Street, Reno, NV 89557, USA.
Neuroimage. 2014 Jul 1;94:129-137. doi: 10.1016/j.neuroimage.2014.03.013. Epub 2014 Mar 17.
Shape and texture provide cues to object identity, both when objects are explored using vision and via touch (haptics). Visual shape information is processed within the lateral occipital complex (LOC), while texture is processed in medial regions of the collateral sulcus (CoS). Evidence indicates that the LOC is recruited during both visual and haptic shape processing. Here we used functional magnetic resonance imaging (fMRI) to examine whether 'visual' texture-selective areas are similarly recruited when observers discriminate texture via touch. We used a blocked design in which participants discriminated either the texture or shape of unfamiliar 3-dimensional (3D) objects, via vision or touch. We observed significant haptic texture-selective fMRI responses in medial occipitotemporal cortex within areas adjacent to, but not overlapping, those recruited during visual texture discrimination. Although areas of ventromedial temporal cortex are recruited during visual and haptic texture perception, these areas appear to be spatially distinct and modality-specific.
形状和质地为物体的身份提供了线索，无论是通过视觉还是触觉（触觉）进行探索时。视觉形状信息在外侧枕叶复合体（LOC）中处理，而质地在 collateral sulcus（CoS）的内侧区域处理。有证据表明，在视觉和触觉形状处理过程中都会招募 LOC。在这里，我们使用功能磁共振成像（fMRI）来检查当观察者通过触觉辨别质地时，是否同样招募了“视觉”质地选择性区域。我们使用了一个块设计，参与者通过视觉或触觉来区分不熟悉的三维（3D）物体的质地或形状。我们在与视觉质地辨别过程中募集的区域相邻但不重叠的内侧枕颞叶皮层中观察到显著的触觉质地选择性 fMRI 反应。尽管腹侧颞叶皮层的区域在视觉和触觉质地感知中被招募，但这些区域似乎在空间上是不同的，并且是模态特异性的。
