Wiesendanger M, Kaluzny P, Kazennikov O, Palmeri A, Perrig S
Institut de physiologie, Université de Fribourg, Switzerland.
Can J Physiol Pharmacol. 1994 May;72(5):591-4. doi: 10.1139/y94-084.
The issue of bimanual temporal coordination in human subjects is discussed for three selected movement paradigms: (i) simple, symmetric, bimanual finger movements, (ii) bimanual unloading, and (iii) a complex bimanual pull and grasp task. Temporal synchronization was found for all three experiments and was least variable for the first experiment. In the second experiment, synchronization concerned unloading with the index finger of one hand (electromyographic activation of the first dorsal interosseus muscle) and the postural adjustment of the load-bearing index finger of the other hand (electromyographic deactivation of the first dorsal interosseus muscle). In the third experiment, a goal-related temporal invariance was observed, even in the absence of visual guidance. Possible neural mechanisms for the observed temporal coordination of the three types of bimanual movements are discussed, as well as the concepts of goal invariance and motor equivalence.
针对三种选定的运动范式，讨论了人类受试者双手时间协调的问题：（i）简单、对称的双手手指运动，（ii）双手卸载，以及（iii）复杂的双手拉取和抓握任务。在所有三个实验中均发现了时间同步，且第一个实验中的变化最小。在第二个实验中，同步涉及一只手食指的卸载（第一背侧骨间肌的肌电图激活）和另一只手承重食指的姿势调整（第一背侧骨间肌的肌电图失活）。在第三个实验中，即使没有视觉引导，也观察到了与目标相关的时间不变性。讨论了观察到的三种类型双手运动的时间协调的可能神经机制，以及目标不变性和运动等效性的概念。
