Simmons R W, Richardson C
Brain Res. 1984 Jun 8;302(2):239-44. doi: 10.1016/0006-8993(84)90236-1.
Two experiments investigated whether the equilibrium point hypothesis or the mass-spring model of motor control subserves positioning accuracy during spring loaded, rapid, bi-articulated movement. For intact preparations, the equilibrium point hypothesis predicts response accuracy to be determined by a mixture of afferent and efferent information, whereas the mass-spring model predicts positioning to be under a direct control system. Subjects completed a series of load-resisted training trials to a spatial target. The magnitude of a sustained spring load was unexpectedly increased on selected trials. Results indicated positioning accuracy and applied force varied with increases in load, which suggests that the original efferent commands are modified by afferent information during the movement as predicted by the equilibrium point hypothesis.
两项实验探究了在弹簧加载的快速双关节运动中，运动控制的平衡点假说或质量-弹簧模型是否有助于定位精度。对于完整的实验准备，平衡点假说预测反应精度由传入和传出信息的混合决定，而质量-弹簧模型预测定位受直接控制系统控制。受试者完成了一系列针对空间目标的抗负荷训练试验。在选定的试验中，持续弹簧负荷的大小意外增加。结果表明，定位精度和施加的力随负荷增加而变化，这表明在运动过程中，如平衡点假说所预测的那样，原始的传出指令会被传入信息修改。
