Haptic study of three-dimensional objects activates extrastriate visual areas
Haptic study of three-dimensional objects activates extrastriate visual areas
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DOI：
10.1016/s0028-3932(02)00017-9
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发表时间：
2002-01-01
期刊：
影响因子：
2.6
通讯作者：
Goodale, MA
中科院分区：
文献类型：
--
作者：
James, TW;Humphrey, GK;Goodale, MA
在人类和许多其他灵长类动物中，视觉系统在物体识别中起着主要作用。但是物体也可以通过触觉探索来识别，触觉探索使用我们的触觉。尽管如此，有人认为触觉系统利用“视觉”处理来构建对象的表示。研究视觉和触觉系统之间可能的相互作用。我们使用功能性磁共振成像来测量跨通道触觉-视觉启动对大脑激活的影响。受试者在进入扫描仪之前，通过视觉或触觉研究三维新颖的粘土物体。在扫描过程中。受试者观看视觉印刷，触觉启动，和非启动对象。他们也会用触觉探索非启动的物体。视觉和触觉探索的非启动对象产生显着的激活在几个大脑区域。并在中枕区（MO）产生重叠激活。观看视觉和触觉引发的对象产生更多的激活比观看非引发的对象在这两个区域MO和外侧枕区（LO）。总之，触觉探索新的三维物体产生激活。不仅在躯体感觉皮层，而且在与视觉处理相关的枕叶皮层区域。此外。当这些物体随后被观看时，先前与这些物体的触觉体验增强了视觉区域的激活。两者合计，这些结果表明，腹侧视觉通路的对象表示系统被利用触觉对象感知。(C)2002爱思唯尔科技有限公司版权所有。
In humans and many other primates, the visual system plays the major role in object recognition. But objects call also he recognized through haptic exploration, which uses our sense of touch. Nonetheless, it has been argued that the haptic system makes use of 'visual' processing to construct a representation of the object. To investigate possible interactions between the visual and haptic systems. we used functional magnetic resonance imaging to measure the effects of cross-modal haptic-to-visual priming on brain activation. Subjects Studied three-dimensional novel clay objects either visually or haptically before entering the scanner. During scanning. Subjects viewed visually printed, haptically primed, and non-primed objects. They also haptically explored non-primed objects. Visual and haptic exploration of non-primed objects produced significant activation in several brain regions. and produced overlapping activation in the middle occipital area (MO). Viewing visually and haptically primed objects produced more activation than viewing non-primed objects in both area MO and the lateral occipital area (LO). In summary, haptic exploration of novel three-dimensional Objects produced activation. not only in somatosensory cortex, but also in areas of the occipital cortex associated with visual processing. Furthermore. previous haptic experience with these objects enhanced activation in visual areas when these same objects Were subsequently viewed. Taken together, these results suggest that the object-representation systems of the ventral visual pathway are exploited for haptic object perception. (C) 2002 Elsevier Science Ltd. All rights reserved.