Jaric S, Corcos D M, Latash M L
Faculty for Physical Culture, University of Belgrade, Yugoslavia.
Exp Brain Res. 1992;91(1):129-34. doi: 10.1007/BF00230021.
Three subjects practiced fast, accurate 36 degrees elbow flexion movements to a 2.5 degrees target for 14 sessions of 100 trials (total, 1400 trials). Subjects then returned for a 15th experimental session in which they were asked to perform 15 movements under identical conditions to the practice condition. They were then tested under three experimental conditions without visual feedback: (1) identical to the practice conditions, (2) with small shifts in starting position (+/- 3 degrees of the practiced starting position), that were insufficient for subjective discrimination and, therefore, subjects were instructed to repeat the practiced movements; and (3) with a large shift in starting position (range, +/- 15 degrees of the practiced starting position), under the instruction to move to the same target. Experimental conditions 2 and 3 demonstrated that shifts in starting position were partially correlated with shifts in final position. These results are interpreted from the point of view of the equilibrium-point hypothesis of motor control.
三名受试者针对2.5度的目标进行了快速、准确的36度肘部弯曲动作练习，共进行了14组，每组100次试验（总计1400次试验）。然后，受试者返回进行第15次实验，要求他们在与练习条件相同的情况下进行15次动作。之后，他们在三种无视觉反馈的实验条件下接受测试：（1）与练习条件相同；（2）起始位置有小的偏移（相对于练习的起始位置为±3度），这种偏移不足以进行主观辨别，因此受试者被要求重复练习的动作；（3）起始位置有大的偏移（范围为相对于练习的起始位置±15度），并被要求移向相同的目标。实验条件2和3表明，起始位置的偏移与最终位置的偏移部分相关。这些结果是从运动控制的平衡点假设的角度来解释的。
