Stance stability with unilateral and bilateral light touch of an external stationary object
Stance stability with unilateral and bilateral light touch of an external stationary object
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DOI：
10.1080/08990220500420640
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发表时间：
2005-12-01
影响因子：
0.9
通讯作者：
Dickstein, R
中科院分区：
文献类型：
--
作者：
Dickstein, R
单侧轻指尖触摸一个静止的物体有一个显着的稳定效果的姿态摇摆在站姿。本研究的目的是找出这种效果是否增强了双边轻触平行静止物体。54名健康受试者的姿势摇摆进行了测试，在四个站姿条件：没有触摸;单侧左轻触摸的左手柄的步行者;单侧右轻触摸的右手柄的同一步行者;和双边轻触摸的两个手柄。在测试过程中，受试者蒙着眼睛站在放置在Tetrax平衡系统的左右测力板上的两个泡沫垫上。每种条件下的测试持续45 s，并以随机顺序执行两次。正如预期的那样，单侧左或右指尖轻触摸显著减少了姿势摇摆。双侧轻触可进一步显著降低。此外，轻触摸条件与减少压力波动之间的脚跟和前脚的同脚以及对侧脚，伴随着增加的重量转移波动之间的两只脚。双侧轻触摸的姿势摇摆的减少表明双侧触摸输入的皮层调制，稳定反应的增强。
Unilateral light fingertip touch of a stationary object has a significant stabilizing effect on postural sway during stance. The purpose of this study was to find out if this effect is enhanced by bilateral light touch of parallel stationary objects. The postural sway of 54 healthy subjects was tested in four stance conditions: no touch; unilateral left light touch of the left handle of a walker; unilateral right light touch of the right handle of the same walker; and bilateral light touch of the two handles. During testing, subjects stood blindfolded on two foam pads placed on the left and right force plates of the Tetrax balance system. Testing in each condition lasted 45s and was executed twice in a random order. As expected, postural sway was significantly reduced by unilateral left or right light fingertip touch. It was significantly further decreased by bilateral light touch. In addition, light touch conditions were associated with a reduction in pressure fluctuations between the heel and forefoot of the same foot as well as those of the contralateral foot, with a concomitant increase in weight shift fluctuations between the two feet. The decrease in postural sway with bilateral light touch suggests cortical modulation of the bilateral touch inputs, with enhancement of the stabilizing response.