Abstract

Transcutaneous electrical spinal cord stimulation (SсТS) was carried out in different phases of the stepping cycle in order to control the kinematic parameters of the step in healthy subjects walking on a treadmill. ScTS during the swing phase at the T11–T12 level activated the flexor motor pools and caused a change in the motion amplitude in the hip, knee and ankle joints, as well as increased the height of leg elevation. ScTS at the stance phase at the L1–L2 level, addressed to the extensor motor pools, did not affect the kinematics of stepping movements. A shift in the start of T11–T12 stimulation to 100–150 ms before the initiation of the swing phase or its prolongation by 100 ms after the end of the swing phase caused significant changes in the kinematics of stepping movements. Essential for the start of stimulation is the moment of pushing the leg off the support a little earlier than beginning of the swing phase . Prolongation of the stimulation period in the swing phase allows to increase ankle join flexion The choice of the optimal algorithm of phase-dependent ScTS for the activation of flexor and extensor motor pools during the stepping cycle increases the efficiency of stimulation in motor function rehabilitation techniques.

中文翻译：

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经皮脊髓电刺激的相移对人体步进运动运动学特性的影响

摘要

为了控制健康人在跑步机上行走的步伐，在步进周期的不同阶段进行了经皮脊髓电刺激（SсТS）。在T11–T12级别的摆动阶段，ScTS激活屈肌运动池，并导致髋，膝和踝关节的运动幅度发生变化，并导致腿部抬高。处于站立阶段的L1-L2级别的ScTS，针对伸肌运动池，不影响步进运动的运动学。T11–T12刺激的开始偏移到摆动阶段开始之前的100–150 ms，或者其在摆动阶段结束之后延长100 ms的时间引起了步进运动的运动学上的显着变化。开始刺激的关键是比摆动阶段开始的腿提早离开支撑的时刻。延长摆动阶段的刺激时间可以增加踝关节的屈曲度。在步伐周期中激活屈肌和伸肌运动池的相位相关ScTS最佳算法的选择，可以提高运动功能康复技术中的刺激效率。