Two representations of the hand in area 4 of a primate. II. Somatosensory input organization.
Two representations of the hand in area 4 of a primate. II. Somatosensory input organization.
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灵长类动物 4 区手的两种表现形式。
DOI：
10.1152/jn.1982.48.1.150
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发表时间：
1982
影响因子：
2.5
通讯作者：
Preston,JB
中科院分区：
文献类型：
--
作者：
Strick,PL;Preston,JB
6.接受深度输入的单位的感受野和刺激在同一部位引起的运动通常局限在身体的同一部位。然而，兴奋神经元的被动运动方向与皮质内刺激引起的运动方向之间没有固定的关系。7.我们的结论是，包含前肢远端代表的运动皮质区域不能再被认为是一个主要接受动觉输入的同质结构。我们的结果表明，运动皮质的这一区域包含两个空间上独立的运动表征，可以根据它们的体感传入信息来定义它们。皮肤输入集中在尾部的手部运动表示，这表明它可能优先参与使用触觉反馈来执行和指导的动作。相反，深度输入集中在旋转1运动表征中，表明它可能优先参与使用动觉反馈来执行和指导的动作。
6. The receptive fields of units receiving deep input and the movement evoked by stimulation at the same site usually were confined to the same body part. However, there was no fixed relationship between the direction of passive movement that excited neurons and the direction of movement evoked by intracortical stimulation. 7. We conclude that the region of motor cortex containing the representation of the distal forelimb can no longer be considered a homogeneous structure that receives predominately kinesthetic input. Our results suggest that this region of motor cortex contains two spatially separate motor representations that can be defined on the basis of their somatosensory afferent input. The concentration of cutaneous input in the caudal hand motor representation suggests that it may be preferentially involved in movements that use tactile feedback for their execution and guidance. In contrast, the concentration of deep input in the rostra1 motor representation suggests that it might be preferentially involved in movements that use kinesthetic feedback for their execution and guidance.