Renmin University of China.
Langfang Teachers University.
Motor Control. 2020 Sep 10;24(4):605-623. doi: 10.1123/mc.2020-0009.
The aim of the current work was to verify three-dimensional directional effects on the reproduction error precision of the human upper limb position. Thirty male subjects without history of upper limb pathology were recruited from Renmin University of China. A three-dimensional position reproduction task in six directions (up, down, left, right, far, and near) was performed by each subject. The results suggested that the proprioceptive sense of upper limb position depends on the direction, with smaller absolute errors in Directions 4 (right) and 5 (far) than in Directions 1 (up), 2 (down), 3 (left), and 6 (near). Proprioception near the end of the elbow joint range of motion may be more reliable and sensitive. Subjects reproduced fewer ranges in the horizontal plane (Directions 3, 5, and 6) and they overshot the target position along the z-axis (vertical direction) except for Direction 6. Overestimations of position in the z-axis may be caused by overestimations of force.
本研究旨在验证三维方向对人体上肢位置再现误差精度的影响。研究对象为 30 名来自中国人民大学、无上肢病史的男性。每位受试者完成六个方向（上、下、左、右、远、近）的三维位置再现任务。结果表明，上肢位置的本体感觉依赖于方向，方向 4（右）和 5（远）的绝对误差小于方向 1（上）、2（下）、3（左）和 6（近）。可能是靠近肘关节运动范围末端的本体感觉更可靠、更敏感。受试者在水平面（方向 3、5 和 6）的再现范围较少，且除方向 6 外，他们在 z 轴（垂直方向）上超过了目标位置。z 轴上位置的高估可能是由于力的高估引起的。
