触觉感知时视皮质跨模态激活的fMRI研究进展

近来越来越多的认知脑功能成像研究发现,盲人和明视人在许多触觉感知任务（如“阅读”盲文、触觉物体识别）中,其视皮质存在不同程度的激活.这提示视皮质除了接受视觉信息的刺激外,还可能参与了触觉感知活动.关于视皮质触觉感知时的跨模态变化及其神经机制,一些研究者结合功能磁共振成像进行了大量的探索,并取得了一定的成果.就盲人和明视人触觉感知时视皮质的跨模态激活及其机制等方面的研究进展予以综述.

Research progress of functional magnetic resonance imaging in cross-modal activation of visual cortex during tactile perception

An increasing amount of neuroimaging studies recently demonstrated activation of visual cortex in both blind and sighted participants when performing a variety of tactile tasks such as Braille reading and tactile object recognition, which indicates that visual cortex not only receives visual information, but may participate in tactile perception. To address these cross-modal changes of visual cortex and the neurophysiological mechanisms, many researchers conducted explosive studies using functional magnetic resonance imaging （fMRI） and have made some achievements. This review focuses on cross-modal activation of visual cortex and the underlying mechanisms during tactile perception in both blind and sighted individuals.