Oludare Simisola O, Ma Charlie C, Aruin Alexander S
Department of Physical Therapy, University of Illinois at Chicago, Chicago, IL 60612, USA.
PhD Program in Rehabilitation Sciences, College of Applied Health Sciences, University of Illinois at Chicago, Chicago, IL 60612, USA.
Rehabil Res Pract. 2017;2017:4853840. doi: 10.1155/2017/4853840. Epub 2017 Apr 26.
Individuals with unilateral impairment perform symmetrical movements asymmetrically. Restoring symmetry of movements is an important goal of rehabilitation. The aim of the study was to evaluate the effect of using discomfort-inducing devices on movement symmetry. Fifteen healthy individuals performed the sit-to-stand (STS) maneuver using devices inducing unilateral discomfort under the left sole and left thigh or right sole and right thigh and without them. 3D body kinematics, ground reaction forces, electrical activity of muscles, and the level of perceived discomfort were recorded. The center of mass (COM), center of pressure (COP), and trunk displacements as well as the magnitude and latency of muscle activity of lower limb muscles were calculated during STS and compared to quantify the movement asymmetry. Discomfort on the left and right side of the body (thigh and feet) induced statistically significant displacement of the trunk towards the opposite side. There was statistically significant asymmetry in the activity of the left and right Tibialis Anterior, Medial Gastrocnemius, and Biceps Femoris muscles when discomfort was induced underneath the left side of the body (thigh and feet). The technique was effective in causing asymmetry and promoted the use of the contralateral side. The outcome provides a foundation for future investigations of the role of discomfort-inducing devices in improving symmetry of the STS in individuals with unilateral impairment.
单侧功能受损的个体在进行对称运动时会表现出不对称性。恢复运动的对称性是康复的一个重要目标。本研究的目的是评估使用引起不适的装置对运动对称性的影响。15名健康个体在使用分别置于左足底和左大腿或右足底和右大腿下方、会引起单侧不适的装置以及不使用该装置的情况下进行坐立（STS）动作。记录了三维人体运动学、地面反作用力、肌肉电活动以及感知到的不适程度。在坐立过程中计算了重心（COM）、压力中心（COP）和躯干位移，以及下肢肌肉活动的幅度和潜伏期，并进行比较以量化运动不对称性。身体左右两侧（大腿和足部）的不适会导致躯干向对侧产生具有统计学意义的位移。当在身体左侧（大腿和足部）下方引起不适时，左右胫骨前肌、腓肠肌内侧头和股二头肌的活动存在统计学意义的不对称性。该技术在引起不对称性方面是有效的，并促进了对侧的使用。这一结果为未来研究引起不适的装置在改善单侧功能受损个体坐立对称性方面的作用奠定了基础。
