Latash M L, Gottlieb G L
Department of Physical Medicine and Rehabilitation, Rush Medical College, 1753 West Congress Parkway, Chicago, IL 60612, USA.
J Mot Behav. 1991 Sep;23(3):163-77. doi: 10.1080/00222895.1991.10118360.
We describe a model for the regulation of fast, single-joint movements, based on the equilibrium-point hypothesis. Limb movement follows constant rate shifts of independently regulated neuromuscular variables. The independently regulated variables are tentatively identified as thresholds of a length sensitive reflex for each of the participating muscles. We use the model to predict EMG patterns associated with changes in the conditions of movement execution, specifically, changes in movement times, velocities, amplitudes, and moments of limb inertia. The approach provides a theoretical neural framework for the dual-strategy hypothesis, which considers certain movements to be results of one of two basic, speed-sensitive or speed-insensitive strategies. This model is advanced as an alternative to pattern-imposing models based on explicit regulation of timing and amplitudes of signals that are explicitly manifest in the EMG patterns.
我们基于平衡点假说描述了一种快速单关节运动调节模型。肢体运动遵循独立调节的神经肌肉变量的恒定速率变化。这些独立调节的变量初步被确定为每个参与肌肉的长度敏感反射阈值。我们使用该模型预测与运动执行条件变化相关的肌电图模式，具体而言，是运动时间、速度、幅度和肢体惯性矩的变化。该方法为双策略假说提供了一个理论神经框架，该假说认为某些运动是两种基本的、速度敏感或速度不敏感策略之一的结果。该模型是作为基于对肌电图模式中明确显示的信号的时间和幅度进行明确调节的模式强加模型的替代方案而提出的。
