Popović Maneski Lana, Topalović Ivan, Jovičić Nenad, Dedijer Suzana, Konstantinović Ljubica, Popović Dejan B
Institute of Technical Sciences of the Serbian, Academy of Sciences and Arts, Belgrade, Serbia.
Faculty of Electrical Engineering, University of Belgrade, Serbia.
Med Eng Phys. 2016 Nov;38(11):1251-1259. doi: 10.1016/j.medengphy.2016.06.004. Epub 2016 Jun 25.
Transcutaneous activation of muscles with electrical stimulation has limited selectivity in recruiting paralyzed muscles in stroke patients. However, the selectivity could be increased by the application of smaller electrodes and their appropriate positioning on the skin. We developed a method for selecting the appropriate positions of the stimulating electrodes based on electromyography (EMG). The EMG activity maps were estimated from signals recorded with two electrode arrays and two 24-channel wearable amplifiers positioned on the nonparetic and paretic forearms. The areas where the difference between the EMG maps obtained from the nonparetic and paretic arms was significant were identified as the stimulation sites. The stimulation was applied through array electrodes with magnetic holders and two wearable stimulators with four output channels each. The measures of functionality included joint angles measured with goniometers (hand opening) and grasp force measured with a multi-contact dynamometer (grasping). The stimulation protocol comprised co-activation of flexors and extensors to stabilize the wrist joint and prevent pronation/supination.
经皮电刺激激活肌肉在中风患者中招募瘫痪肌肉的选择性有限。然而，通过使用较小的电极并将其在皮肤上适当定位，可以提高选择性。我们开发了一种基于肌电图（EMG）选择刺激电极合适位置的方法。通过放置在非瘫痪和瘫痪前臂上的两个电极阵列和两个24通道可穿戴放大器记录的信号估计EMG活动图。将非瘫痪和瘫痪手臂获得的EMG图之间差异显著的区域确定为刺激部位。通过带有磁性固定器的阵列电极和两个各有四个输出通道的可穿戴刺激器施加刺激。功能测量包括用角度计测量的关节角度（手部张开）和用多触点测力计测量的抓握力（抓握）。刺激方案包括协同激活屈肌和伸肌以稳定腕关节并防止旋前/旋后。
