Representation of reaching and grasping in the monkey postcentral gyrus
Representation of reaching and grasping in the monkey postcentral gyrus
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猴子中央后回伸手和抓握的表征
DOI：
10.1016/0304-3940(96)12911-6
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发表时间：
1996
影响因子：
2.5
通讯作者：
Michio Tanaka
中科院分区：
文献类型：
--
作者：
Y. Iwamura;Michio Tanaka
在警觉猴的中央后回的2区和更远的尾侧部分，我们发现了优先或仅被猴子的自我发起的手动作激活的神经元，以达到或抓住物体。在这些神经元中，我们研究了那些选择性的神经元：（1）伸出手臂并向物体伸展手指（到达）;（2）用第一和第二手指抓握（桡侧抓握，精确抓握）;（3）用尺侧手指和手掌皮肤抓握（尺侧抓握，整个手抓握）;或（4）用远端手指垫和指甲抓或触摸物体。在指区的外侧部分发现了放射状抓握型神经元，而所有其他类型的神经元都在内侧部分发现。每一个手动作神经元都存在于一个神经元簇中，这些神经元簇具有共同的感受野，对应于特定类型抓握的有效部位。
In area 2 and further caudal part of the alert monkey's postcentral gyrus, we found neurons which were activated preferentially or only by monkey's self-initiated hand actions to reach or grasp objects. Among them we studied those neurons which were selective to either (1) projecting the arm and stretching digits toward an object (reaching); (2) grasping with the first and the second digit (radial grasp, precision grip); (3) grasping with the ulnar digits and palmar skin (ulnar grasp, whole hand grip); or (4) scratching or touching an object with distal digit pads and nails. Neurons of the radial grasp type were found in the lateral part of the digit region which all other types of neurons were found in the medial part. Each of hand action neurons was found in a cluster of neurons which had common receptive fields corresponding to effective sites for the particular type of grasping.