Graduate School of Comprehensive Rehabilitation, Osaka Prefecture University, Habikino, Japan.
Graduate School of Rehabilitation Science, Osaka Metropolitan University, Habikino, Japan.
Percept Mot Skills. 2023 Dec;130(6):2547-2563. doi: 10.1177/00315125231197840. Epub 2023 Sep 11.
Our purpose in the present study was to examine whether moving tactile stimuli to the sole to mimic moving weight distribution over the feet during gait would influence body sway in quiet stance. Fifteen healthy males maintained the quiet stance, and we delivered moving tactile stimuli to mimic the change in their weight distribution during gait. Moving tactile stimuli did not change the length of the center of pressure (COP) displacement and COP position. Vision decreased the length of the COP, but it did not interact with moving tactile stimuli for the COP length and position. The COP position rhythmically moved in the medial-lateral axis along with the cycle of moving tactile stimuli. The COP was at the lateral peak position at the period at which moving tactile stimuli mimicked the weight distribution in the transition between the swing and stance phases of the gait cycle. This finding may indicate that the body is positioned at the lateral peak position in quiet stance when people perceive the sensation of weight distribution over the feet at the most unstable phase of the gait cycle. We suggest that moving tactile stimuli to the sole may induce medial-lateral body sway before gait initiation for patients with Parkinson's disease to improve their freezing of gait initiation.
本研究旨在探讨在静立位时向足底传递模拟步行时足底负重分布变化的动触觉刺激，是否会影响身体摆动。15 名健康男性保持静立位，我们向足底传递动触觉刺激以模拟其在步行时的负重分布变化。动触觉刺激并未改变压力中心（COP）位移和 COP 位置的长度。视觉降低了 COP 的长度，但对 COP 长度和位置与动触觉刺激之间没有相互作用。COP 位置沿着动触觉刺激的周期在中-侧轴上有节奏地移动。在动触觉刺激模拟步行周期摆动相和支撑相之间转换时的负重分布的周期内，COP 位于外侧峰值位置。这一发现可能表明，当人们在步态周期最不稳定的阶段感知到足底负重分布的感觉时，身体在静立位时处于外侧峰值位置。我们建议，向足底传递动触觉刺激可能会诱导帕金森病患者在开始行走前进行中-侧身体摆动，以改善其行走起始冻结。
