Caminiti R, Johnson P B, Burnod Y, Galli C, Ferraina S
Istituto di Fisiologia umana, Facoltà di Medicina e Chirurgia, Università degli Studi di Roma La Sapienza, Italy.
Exp Brain Res. 1990;83(1):228-32. doi: 10.1007/BF00232214.
The activity of 156 neurons was recorded in the premotor cortex (Weinrich and Wise 1982) and in an adjoining rostral region of area 6 (area 6 DR; Barbas and Pandya 1987) while monkeys made visually-guided arm movements of similar direction within different parts of space. The activity of individual neurons varied most for a given preferred direction of movement within each part of space. These neurons (152/156, 97.4%) were labeled as directional. The spatial orientation of their preferred directions shifted in space to "follow" the rotation of the shoulder joint necessary to bring the arm into the different parts of the work-space. These results suggest that the cortical areas studied represent arm movement direction within a coordinate system rotating with the arm and where signals about the movement direction relate to the motor plan through a simple invariant relationship, that between cell preferred direction and arm orientation in space.
在猴子于空间不同部位做出方向相似的视觉引导手臂运动时，记录了运动前皮质（温里希和怀斯，1982年）以及6区相邻的嘴侧区域（6区DR；巴尔巴斯和潘迪亚，1987年）中156个神经元的活动。在空间的每个部位，对于给定的偏好运动方向，单个神经元的活动变化最大。这些神经元（152/156，97.4%）被标记为方向选择性神经元。它们偏好方向的空间取向在空间中发生变化，以“跟随”将手臂移动到工作空间不同部位所需的肩关节旋转。这些结果表明，所研究的皮质区域在一个随手臂旋转的坐标系中代表手臂运动方向，并且在该坐标系中，关于运动方向的信号通过一种简单的不变关系（即细胞偏好方向与空间中手臂取向之间的关系）与运动计划相关。
