Iyengar Veena, Santos Marcio J, Ko Michael, Aruin Alexander S
Department of Physical Therapy (MC 898), University of Illinois at Chicago, 1919 W Taylor Street, Chicago, IL 60612, USA.
Clin Neurophysiol. 2009 Mar;120(3):626-31. doi: 10.1016/j.clinph.2008.12.029. Epub 2009 Feb 24.
It was recently shown that the magnitude of grip force utilized to lift and transport a hand-held object decreased if a light touch from the contralateral finger is provided [Aruin AS. Support-specific modulation of grip force in individuals with hemiparesis. Arch Phys Med Rehabil 2005;86:768-75]. The rationale of the study is to find out whether or not the individuals with multiple sclerosis (MS) have the same behavior as control subjects.
Eight patients with MS and eight control subjects performed the task of lifting and transporting an instrumented object with provision of light touch of the contralateral index finger to the wrist of the target arm and without it. The tasks of placing the object on a shelf and a simulation of a drinking maneuver were studied. Peak grip force, force ratio, latency, and time lag were recorded and analyzed.
The mean peak grip force decreased in conditions with application of light finger touch in patients and control subjects while performing both the experimental tasks. The force ratio also improved with application of light finger touch.
Individuals with MS apply smaller grip force if they utilize a finger touch.
Findings provide better understanding of how patients with MS control grip force and suggest that a light touch approach could be considered as a valuable modality in the rehabilitation of these patients.
最近的研究表明，如果对侧手指提供轻微触摸，用于提起和搬运手持物体的握力大小会降低[Aruin AS. 偏瘫患者握力的支撑特异性调节。《物理医学与康复档案》2005年；86:768 - 75]。本研究的目的是探究多发性硬化症（MS）患者是否与对照组受试者有相同的行为表现。
8例MS患者和8名对照受试者执行提起和搬运一个装有仪器的物体的任务，期间对侧食指会轻触目标手臂的手腕，同时也进行不提供轻触的情况。研究了将物体放置在架子上以及模拟饮水动作的任务。记录并分析了峰值握力、力比、潜伏期和时间滞后。
在执行两项实验任务时，患者和对照受试者在应用手指轻触的情况下，平均峰值握力均降低。力比在应用手指轻触时也有所改善。
MS患者在利用手指触摸时会施加较小的握力。
研究结果有助于更好地理解MS患者如何控制握力，并表明轻触方法可被视为这些患者康复中的一种有价值的方式。
