Research Institute MOVE, Faculty of Human Movement Sciences, VU University Amsterdam, Amsterdam, The Netherlands.
J Rehabil Med. 2010 Oct;42(9):876-83. doi: 10.2340/16501977-0585.
We aimed to investigate whether position sense acuity of the upper extremity and tracking performance, pen pressure and muscle activity in a tracking task are affected in subjects with neck and upper extremity pain.
Twenty-three subjects with neck and upper extremity pain and 26 healthy controls participated in the study. Position sense acuity of the upper extremity was measured while subjects pointed at targets, without vision of their arm and hand. In the computer tracking task, subjects were instructed to position a cursor within a moving target dot, using a pen on a tablet.
Position sense acuity of the upper extremity was impaired in subjects with pain. Their variable error was 20-30% larger than in healthy controls. Subjects with pain also showed reduced tracking precision. Both the mean and the standard deviation of the distance to target were significantly larger in subjects with pain than in healthy controls, 10% and 13% respectively. No differences between groups were found in pen pressure and muscle activity during tracking.
The results suggest that subjects with pain are limited in performing precision tasks due to impaired position sense of the upper extremity, but do not compensate with increased effort.
本研究旨在探究上肢本体感觉敏锐度、追踪表现（包括笔压和肌肉活动）是否会受到颈肩痛患者的影响。
23 名颈肩痛患者和 26 名健康对照者参与了本研究。在无手臂和手部可视的情况下，让患者指向目标，以测量上肢本体感觉敏锐度。在电脑追踪任务中，要求患者使用笔在平板电脑上定位光标，使其进入移动目标点内。
颈肩痛患者的上肢本体感觉敏锐度受损，其变异性误差比健康对照组大 20-30%。颈肩痛患者的追踪精度也有所降低。与健康对照组相比，疼痛患者的目标距离平均值和标准差分别大 10%和 13%。在追踪过程中，两组的笔压和肌肉活动均无差异。
研究结果表明，颈肩痛患者由于上肢本体感觉受损，在执行精准任务时受到限制，但并未通过增加努力来弥补。
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