Visual pathways for object-oriented action and object recognition: Functional anatomy with PET
Visual pathways for object-oriented action and object recognition: Functional anatomy with PET
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DOI：
10.1093/cercor/7.1.77
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发表时间：
1997-01-01
期刊：
影响因子：
3.7
通讯作者：
Jeannerod, M
中科院分区：
文献类型：
--
作者：
Faillenot, I;Toni, I;Jeannerod, M
本研究的目的是确定参与视觉引导的视觉和物体识别在人类的机制的功能解剖。用正电子发射断层扫描仪研究了7名受试者的脑血流量。在“抓握”条件下，受试者被指示准确地抓握物体。在“匹配”条件下，被试被要求比较所呈现的客体的形状与前一个客体的形状。在“指向”条件（控制），受试者指向对象。抓握和指向之间的比较显示，在下顶叶皮层的前部和部分后顶叶皮层的区域脑血流量（rCBF）增加。抓握和匹配之间的比较显示小脑、中央沟周围的左额叶皮质、内侧额叶皮质和左下顶叶皮质的rCBF增加。最后，匹配和指向之间的比较表明，右颞叶皮层和右后顶叶皮层的rCBF增加。因此，面向对象的行动和对象识别激活了一个共同的后顶叶区域，这表明无论任务的目标是什么，这个区域都会处理某种对象内的空间分析。
The purpose of this study was to identify the functional anatomy of the mechanisms involved in visually guided prehension and in object recognition in humans. The cerebral blood flow of seven subjects was investigated by positron emission tomography Three conditions were performed using the same set of stimuli. in the 'grasping' condition, subjects were instructed to accurately grasp the objects. In the 'matching' condition, subjects were requested to compare the shape of the presented abject with that of the previous one. In the 'pointing' condition (control), subjects pointed towards the objects. The comparison between grasping and pointing showed a regional cerebral blood flow (rCBF) increase in the anterior part of the inferior parietal cortex and part of the posterior parietal cortex. The comparison between grasping and matching showed an rCBF increase in the cerebellum the left frontal cortex around the central sulcus, the mesial frontal cortex and the left inferior parietal cortex. Finally, the comparison between matching and pointing showed an rCBF increase in the right temporal cortex and the right posterior parietal cortex. Thus object-oriented action and object recognition activate a common posterior parietal area, suggesting that some kind of within-object spatial analysis was processed by this area whatever the goal of the task.