Graduate School of Saitama, Prefectural University, Graduate Course of Health and Social Services, 820 San-Nomiya, Koshigaya-shi, Saitama 343-8540, Japan.
Graduate School of Saitama, Prefectural University, Graduate Course of Health and Social Services, 820 San-Nomiya, Koshigaya-shi, Saitama 343-8540, Japan; Research Fellowship for Young Scientists, Japan Society for the Promotion of Science, Tokyo, Japan.
J Electromyogr Kinesiol. 2019 Oct;48:112-120. doi: 10.1016/j.jelekin.2019.07.003. Epub 2019 Jul 12.
Adaptation to split-belt treadmill walking differs between individual stroke survivors. Many discussions only address spatiotemporal parameters that are related to movement, and the changes in interlimb spatiotemporal parameters as a consequence of adaptation are poorly understood.
To investigate symmetry of the center of pressure (CoP) position relative to the center of mass (CoM), and ascertain whether this can be used to identify differences in adaptation of interlimb spatiotemporal parameters among stroke survivors during split-belt walking.
Twenty-two chronic post-stroke patients and nine elderly controls walked in tied- then split-belt (2:1 ratio of fast:slow) conditions. Spatiotemporal parameters were compared within groups to assess symmetry of the CoM-CoP angle at foot contact.
Asymmetry of the CoM-CoP angle was associated with asymmetry of spatiotemporal parameters. Re-establishment of symmetry of CoM-CoP angle was reflected in re-established symmetry of spatiotemporal parameters in post-stroke and control participants.
Post-stroke patients who re-establish symmetry of the COM-COP angle are able to adapt their walking for split-belt perturbation. This suggests that predictively symmetric foot placements on the fast and slow sides are necessary for adaptation in walking. Symmetrical foot placement is achieved by interlimb coordination and may contribute to dynamic stability.
个体脑卒中幸存者对分腿跑台步行的适应能力存在差异。许多讨论仅涉及与运动相关的时空参数，而对适应过程中肢体间时空参数的变化知之甚少。
研究相对于质心（CoM）的压力中心（CoP）位置的对称性，并确定其是否可用于识别脑卒中幸存者在分腿跑台行走过程中肢体间时空参数适应的差异。
22 名慢性脑卒中患者和 9 名老年对照者在系紧然后分腿（快：慢比例为 2:1）条件下行走。在组内比较时空参数，以评估足部接触时 CoM-CoP 角度的对称性。
CoM-CoP 角度的不对称性与时空参数的不对称性相关。CoM-CoP 角度对称性的重建反映在脑卒中患者和对照组中时空参数对称性的重建。
能够重建 CoM-CoP 角度对称性的脑卒中患者能够适应分腿跑台的干扰。这表明在快速和慢速侧预测性对称的足部放置对于行走适应是必要的。对称的足部放置是通过肢体间的协调实现的，可能有助于动态稳定性。
