Lacquaniti F, Soechting J F
Brain Res. 1984 Oct 8;311(1):161-6. doi: 10.1016/0006-8993(84)91411-2.
When an external perturbation acts on a segment of a multi-jointed limb, angular motion results in all limb segments which are inertially linked to the one which is perturbed. In such a situation, different hypotheses on the functional role of the stretch reflex lead to different predictions on reflex responses by the stretched muscles. These predictions were examined experimentally and it was found that the EMG responses of elbow muscles evoked by forces applied to either the upper arm or the forearm were not uniquely related to changes in elbow angular position. They were instead correlated with the direction of changes in the net elbow torque resulting from the perturbation.
当外部扰动作用于多关节肢体的某一段时，角运动会在所有与受扰动段惯性相连的肢体节段中产生。在这种情况下，关于牵张反射功能作用的不同假说是对被拉伸肌肉的反射反应作出不同预测的依据。这些预测通过实验进行了检验，结果发现，施加于上臂或前臂的力所诱发的肘部肌肉肌电图反应与肘部角位置的变化并非唯一相关。相反，它们与扰动引起的净肘部扭矩变化方向相关。
