Abstract

Postural instability affects motor tasks after a stroke. We investigated the strategies used to maintain balance during quiet standing posture and dynamic tasks in a video game. Sixteen stroke volunteers (12 males, 56 ± 9 years, post-stroke time 35 ± 10 months) and sixteen matched healthy volunteers had their biomechanical data collected to obtain the variables: center of mass, base of support, margin of stability, and weight symmetry. Healthy individuals and stroke patients showed similar dynamic stability. However, they adopted different motor strategies to achieve this: healthy individuals increased their base of support as they progressed to more challenging tasks, and stroke volunteers maintained the same base. The margin of stability of stroke volunteers was correlated with the MiniBEST scale.

摘要

姿势不稳定会影响中风后的运动任务。我们研究了在视频游戏中安静站立姿势和动态任务中保持平衡的策略。收集 16 名中风志愿者（12 名男性，56 ± 9 岁，中风后时间 35 ± 10 个月）和 16 名匹配的健康志愿者的生物力学数据，以获得变量：质心、支撑基础、稳定裕度和体重对称。健康个体和中风患者表现出相似的动态稳定性。然而，他们采用了不同的运动策略来实现这一目标：健康个体在完成更具挑战性的任务时增加了他们的支持基础，而中风志愿者则保持相同的基础。中风志愿者的稳定性裕度与 MiniBEST 量表相关。