Buneo C A, Boline J, Soechting J F, Poppele R E
Department of Physiology, University of Minnesota, Minneapolis 55455, USA.
Exp Brain Res. 1995;104(3):467-79. doi: 10.1007/BF00231981.
We investigated, by using simulations, possible mechanisms responsible for the errors in the direction of arm movements exhibited by deafferented patients. Two aspects of altered feedforward control were evaluated: the inability to sense initial conditions and the degradation of an internal model. A simulation which assumed no compensation for variations in initial arm configuration failed to reproduce the characteristic pattern of errors. In contrast, a simulation that assumed random variability in the generation of joint torque resulted in a distribution of handpaths which resembled some aspects of the pattern of errors exhibited by deafferented patients.
我们通过模拟研究了去传入神经患者手臂运动方向出现误差的可能机制。评估了前馈控制改变的两个方面：无法感知初始条件和内部模型的退化。一个假设不对初始手臂配置变化进行补偿的模拟未能重现特征性的误差模式。相比之下，一个假设关节扭矩产生存在随机变异性的模拟导致了手部路径的分布，这与去传入神经患者表现出的误差模式的某些方面相似。
