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【Nature】顶叶皮质存在自动模仿系统
Mirror-image representation of action in the anterior parietal cortex.
Shmuelof L, Zohary E.
[1] Neurobiology Department, The Hebrew University of Jerusalem, Givat ram, Jerusalem, Israel, 91904, Israel. [2] Present address: Motor Performance Laboratory, The Neurological Institute, Columbia University Medical Center, 710 West 168th Street, New York, New York 10032, USA.
Mimicking hand actions made by someone facing us (that is, allocentric viewpoint) is typically performed with the opposite hand. Using functional magnetic resonance imaging (fMRI), we found a similar mirror-image representation of others' actions in the human anterior parietal cortex. Viewing egocentric-based actions elicited greater fMRI activation in the contralteral hemisphere (as in, self action), whereas observation of action seen from an allocentric viewpoint generated greater activation in the ipsilateral hemisphere. This mirror-like mapping occurs without active imitation, providing further evidence for an automatic action-simulation system in the parietal cortex.
题目：顶叶皮质的运动镜像表达
编译：模仿对面人的手部运动通常是用我们的另一只手来完成的。通过功能磁共振（fMRI），我们发现在人类前顶叶皮质存在面前他人活动的镜像表现。观察自我活动引起对侧半球fMRI活动增强，而由观察他人相应活动产生的fMRI活动增强发生在同侧。这种类似镜像的fMRI图形并非主动模仿，从而说明顶叶皮质可能存在自动的运动模仿系统。[标签:content1][标签:content2]
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作者:admin@医学,生命科学 2011-03-10 17:11
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