Experiment 1: Mean proprioceptive acuity.

Mean (± 1 standard deviation) proprioceptive acuity (mm) in Experiment 1 as a function of testing location, testing direction and limb.实验1中，本体感受灵敏度（proprioceptive acuity，单位：毫米）的均值（±1倍标准差）随测试位置、测试方向及肢体的变化关系。