This study investigated the sensorimotor strategies for dynamic balance control in individuals with stroke by restricting sensory input that might influence task accomplishment. Sit-to-stand movements were performed with restricted vision by participants with hemiparesis and healthy controls. The authors evaluated the variability in the position of participants' center of mass and velocity, and the center-of-pressure position, in each orthogonal direction at the lift-off point. When vision was restricted, the variability in the mediolateral center-of-pressure position decreased significantly in individuals with hemiparesis, but not in healthy controls. Participants with hemiparesis adopted strategies that explicitly differed from those used by healthy individuals. Variability may be decreased in the direction that most requires accuracy. Individuals with hemiparesis have been reported to have asymmetrical balance deficits, and that meant they had to prioritize mediolateral motion control to prevent falling. This study suggests that individuals with hemiparesis adopt strategies appropriate to their characteristics.

中文翻译：

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中风后偏瘫患者无视力站立时的感觉运动策略。

这项研究通过限制可能影响任务完成的感觉输入来研究中风个体动态平衡控制的感觉运动策略。偏瘫患者和健康对照者在视力有限的情况下进行了站姿运动。作者评估了在提起点每个正交方向上参与者的质心和速度中心位置以及压力中心位置的变化。当视力受到限制时，偏瘫患者的中外侧压力中心位置的变异性明显降低，而健康对照者则没有。偏瘫患者采用的策略与健康个体所采用的策略明显不同。在最需要准确性的方向上，可变性可能会降低。据报道，患有偏瘫的人具有不对称的平衡不足，这意味着他们必须优先控制中外侧运动以防止跌倒。这项研究表明，偏瘫患者应采取适合其特征的策略。