Multisensory integration of sounds and vibrotactile stimuli in processing streams for "what" and "where".
Multisensory integration of sounds and vibrotactile stimuli in processing streams for "what" and "where".
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DOI：
10.1523/jneurosci.0910-09.2009
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发表时间：
2009-09-02
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影响因子：
--
通讯作者：
Rauschecker JP
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文献类型：
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作者：
Renier LA;Anurova I;De Volder AG;Carlson S;VanMeter J;Rauschecker JP
用于识别和定位物体的皮层通路之间的隔离被认为是大脑中的一般组织原则。然而，很少有人知道这些处理流的单峰与多峰的性质。本研究的主要目的是测试听觉和触觉双通路是否汇聚到专门的多感觉脑区。我们使用功能性磁共振成像（fMRI）直接比较在相同的主题的大脑激活相关的定位和识别可比的听觉和振动触觉刺激。结果表明，右额下回（IFG）和左，右额下回在识别条件下比在定位过程中的触摸和听觉激活。左、右顶下小叶（IPL）、左上级小叶（SPL）和右楔前叶SPL在两种模式定位条件下均被激活。我们建议，专门领域的权利IFG和左，右IFG是多感官运营商的刺激身份的处理，而部分的左，右IPL和SPL是专门用于处理的空间属性独立的感觉方式。
The segregation between cortical pathways for the identification and localization of objects is thought of as a general organizational principle in the brain. Yet, little is known about the unimodal versus multimodal nature of these processing streams. The main purpose of the present study was to test whether the auditory and tactile dual pathways converged into specialized multisensory brain areas. We used functional magnetic resonance imaging (fMRI) to compare directly in the same subjects the brain activation related to localization and identification of comparable auditory and vibrotactile stimuli. Results indicate that the right inferior frontal gyrus (IFG) and both left and right insula were more activated during identification conditions than during localization in both touch and audition. The reverse dissociation was found for the left and right inferior parietal lobules (IPL), the left superior parietal lobule (SPL) and the right precuneus-SPL, which were all more activated during localization conditions in the two modalities. We propose that specialized areas in the right IFG and the left and right insula are multisensory operators for the processing of stimulus identity whereas parts of the left and right IPL and SPL are specialized for the processing of spatial attributes independently of sensory modality.