Gait Initiation With Electromyographically Triggered Electrical Stimulation in People With Partial Paralysis
Gait Initiation With Electromyographically Triggered Electrical Stimulation in People With Partial Paralysis
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DOI：
10.1115/1.3086356
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发表时间：
2009-08-01
影响因子：
1.7
通讯作者：
Triolo, Ronald J.
中科院分区：
文献类型：
--
作者：
Dutta, Anirban;Kobetic, Rudi;Triolo, Ronald J.
功能性电刺激（FES）通过激活下肢肌肉来促进瘫痪后的行走功能。不完全性脊髓损伤（iSCI）的患者保留了对损伤水平以下肌肉的部分意志控制，需要仔细整合FES与完整的自主运动功能，以实现有效行走。FES辅助步进可以以固定速率自动触发（自动触发），通过手动开关（开关触发器）或通过基于肌电图的步态事件检测器（EMG触发器）。据推测，EMG可能是一个更自然的命令源比手动开关，因此将使更好的协调刺激和意志运动功能的步态过程中必要的。在这项研究中，上述假设进行了调查，在两名志愿者与iSCI在地上FES辅助步态启动。四名身体健全的志愿者提供了用于比较的规范性数据。EMG触发的FES辅助步态启动被发现比自动触发和开关触发的情况下更协调和动态更稳定。这突出了表面EMG作为自然命令界面的潜力，以更好地协调步态期间的刺激和意志肌肉活动。
Functional electrical stimulation (FES) facilitates ambulatory function after paralysis by activating the muscles of the lower extremities. Individuals with incomplete spinal cord injury (iSCI) retain partial volitional control of muscles below the level of injury, necessitating careful integration of FES with intact voluntary motor function for efficient walking. The FES-assisted stepping can be triggered automatically at a fixed rate (autotrigger), by a manual switch (switch-trigger), or by an electromyogram-based gait-event-detector (EMG-trigger). It has been postulated that EMG may be a more natural command source than manual switches, and therefore will enable better coordination of stimulated and volitional motor functions necessary during gait. In this study, the above stated hypothesis was investigated in two volunteers with iSCI during the over-ground FES-assisted gait initiation. Four able-bodied volunteers provided the normative data for comparison. The EMG-triggered FES-assisted gait initiation was found to be more coordinated and dynamically more stable than autotriggered and switch-triggered cases. This highlighted the potential of surface EMG as a natural command interface to better coordinate stimulated and volitional muscle activities during gait.