SPATIAL-ORGANIZATION OF PRECENTRAL CORTEX IN AWAKE PRIMATES .2. MOTOR OUTPUTS
SPATIAL-ORGANIZATION OF PRECENTRAL CORTEX IN AWAKE PRIMATES .2. MOTOR OUTPUTS
复制标题
DOI：
10.1152/jn.1978.41.5.1120
复制
发表时间：
1978-01-01
影响因子：
2.5
通讯作者：
WONG, YC
中科院分区：
文献类型：
--
作者：
KWAN, HC;MACKAY, WA;WONG, YC
通过低流动性（<30 .mu.a）心脏内微刺激（ICMS），研究了前肢控制区域中前肢控制区域的输出组织[Macaca Arctoides]。选择关节的运动作为响应指数。关节指定了皮质区域，有关发生的运动。控制更远端关节的皮质区域控制运动的部分是由控制更近端关节的区域所包围的。这导致了一个嵌套的组织，中间有指尖，手腕和肘部区域连续的围栏以及周长的肩部区域。连续关节的区域具有广泛的重叠，而不连续关节的区域的重叠最小或没有重叠。这个重叠的，嵌套的组织跨越了4和6，没有明显的不连续性。在关节区域内，围绕关节的相同运动在一个以上的皮质位置表示。在其控制区内代表了所有有关关节的所有可能运动。最低阈值ICMS基因座主要分布在上述皮质的尾部部分（区域4）上。通常，远端关节区域的基因座的ICMS阈值低于近端，而与尾部的位置无关。
By means of low-current (< 30 .mu.A) intracortical microstimulation (ICMS), the output organization of the forelimb control area in the precentral cortex of awake monkeys [Macaca arctoides] was investigated. Movement about a joint was selected as the index of response. Cortical zones were designated by the joint about which movements occurred. Cortical zone controlling movements of a more distal joint was partly enclosed by a zone controlling a more proximal joint. This resulted in a nested organization with the finger zone in the center, successive enclosures by the wrist and elbow zones, and a shoulder zone at the perimeter. Zones for contiguous joints had extensive overlap, whereas those of noncontiguous joints had minimal or no overlap. This overlapping, nested organization spanned areas 4 and 6 with no apparent discontinuity. The same movement about a joint was in general represented in more than one cortical location within a joint zone. All possible movements about a joint were represented within its control zone. Lowest threshold ICMS loci were predominantly distributed over the caudal portion (area 4) of the precentral cortex. In general, loci in distal joint zones had lower ICMS thresholds than did proximal ones, irrespective of rostrocaudal position.