Kawashima R, Roland P E, O'Sullivan B T
Department of Neuroscience, Karolinska Institute, Stockholm, Sweden.
Brain Res. 1994 Nov 14;663(2):251-6. doi: 10.1016/0006-8993(94)91270-x.
In two studies with positron emission tomography (PET), we found that somatosensory discrimination of length activated the ipsilateral MI, but somatosensory discrimination of shape did not. This occurred even though both tasks required the exclusive use of distal finger and hand movements which were also very similar in both tasks. The activation of the ipsilateral MI was correlated with activations of the premotor cortex in the other hemisphere, the prefrontal cortex and the posterior cingulate cortex, indicating that these areas together with the ipsilateral MI constitute a task-related active network.
在两项正电子发射断层扫描（PET）研究中，我们发现，对长度的体感辨别激活了同侧运动皮层（MI），但对形状的体感辨别却没有。尽管两项任务都要求仅使用远端手指和手部运动，且这两项任务中的此类运动也非常相似，但上述情况依然出现。同侧运动皮层的激活与对侧半球的运动前皮层、前额叶皮层及后扣带回皮层的激活相关，这表明这些区域与同侧运动皮层共同构成了一个与任务相关的活跃网络。
