Jakobs T, Miller J A, Schultz A B
Exp Neurol. 1985 Oct;90(1):129-38. doi: 10.1016/0014-4886(85)90046-9.
Twenty healthy volunteers (ages 18 to 25 years) were tested for their ability to sense the lateral position of the top of their thoracic spine. When moved slowly from side-to-side in the frontal plane with vision occluded and pelvis immobilized, they could sense the position of a midline point on the skin at the T1 level to within 3 mm of a mean center position in relaxed standing tests, and to within 9 mm in supine tests. When subjects centered themselves actively, or additionally, contracted trunk flexor or extensor muscles to predetermined levels of activity, no increase in trunk positioning accuracy was found. The effect of a lateral pelvic tilt or lateral trunk moment had little effect on trunk positioning accuracy, but always induced a characteristic trunk offset. No differences were found in any of these results between males or females, or gymnasts or nongymnasts.
20名健康志愿者（年龄在18至25岁之间）接受了测试，以评估他们感知胸椎顶部横向位置的能力。当在额状面内缓慢地从一侧向另一侧移动，同时遮住视觉且固定骨盆时，在放松站立测试中，他们能够感知T1水平皮肤中线点的位置，误差在平均中心位置的3毫米以内；在仰卧测试中，误差在9毫米以内。当受试者主动使自己居中，或者额外收缩躯干屈肌或伸肌至预定的活动水平时，未发现躯干定位准确性有所提高。骨盆侧倾或躯干侧力矩对躯干定位准确性影响不大，但总会引起特征性的躯干偏移。在这些结果中，男性与女性、体操运动员与非体操运动员之间均未发现差异。
