Objective. To compare the effects of training of jaw and finger movements with and without visual feedback on precision and accuracy. Method. Twenty healthy participants (10 men and 10 women; mean age years) performed two tasks: a jaw open-close movement and a finger lifting task with and without visual feedback before and after 3-day training. Individually determined target positions for the jaw corresponded to 50% of the maximal jaw opening position, and a fixed target position of 20 mm was set for the finger. Movements were repeated 10 times each. The variability in the amplitude of the movements was expressed as percentage in relation to the target position (—accuracy) and as coefficient of variation (CV_prec—precision). Result. and CV_prec were significantly influenced by visual feedback ( and , respectively) and reduced after training jaw and finger movements (). () and CV_prec () were significantly different between jaw and finger movements. The relative changes in () and CV_prec () were different from pretraining to posttraining between jaw and finger movements. Conclusion. The accuracy and precision of standardized jaw and finger movements are dependent on visual feedback and appears to improve more by training in the trigeminal system possibly reflecting significant neuroplasticity in motor control mechanisms.

中文翻译：

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运动训练对下颌和手指运动准确度和精确度的影响。

目标。比较有和没有视觉反馈的下颌和手指运动训练对精度和准确度的影响。方法。20 名健康参与者（10 名男性和 10 名女性；平均年龄年）执行了两项任务：在 3 天的训练前后有和没有视觉反馈的下颌开合运动和手指提升任务。单独确定的下颌目标位置对应于最大下颌张开位置的 50%，并为手指设置了 20 毫米的固定目标位置。每个动作重复10次。运动幅度的可变性表示为相对于目标位置的百分比 ( -accuracy) 和变异系数 (CV _prec -precision)。结果。和 CV _prec受到视觉反馈的显着影响（ 和 ，分别）和训练下巴和手指运动后减少（）。 ()和简历_预审()在下巴和手指运动之间有显着差异。的相对变化（)和简历_预审()与下巴和手指运动之间的训练前和训练后不同。结论。标准化下颌和手指运动的准确性和精确度取决于视觉反馈，并且似乎通过在三叉神经系统中进行训练而得到更多改善，这可能反映了运动控制机制中的显着神经可塑性。