Multi-point surface FES hand rehabilitation system for stroke patients based on eye movement control

Abstract

Recently, the number of stroke patients has increased greatly. Most of them suffer from hand motor impairment, which creates the need for effective rehabilitation systems. Functional electrical stimulation (FES) is a neurorehabilitation method based on brain plasticity, which is widely accepted because it is non-invasive and convenient. However, it is still a challenge to achieve fine finger control by using surface FES. Here, we use multi-point surface FES to achieve individual finger motion. Besides, simple FES does not engage the subjects' attention, and an optimal stimulation position is difficult to identify. Hence, we try to integrate FES with sensory control by presenting a multi-point FES system based on eye movement control. By programming the electrodes display interface and establishing communication with the FES device and the eye tracker, subjects can change stimulation points via their eye movements. Experiments were performed to test the validity and safety of the proposed system. Feedback data was obtained using a 3D motion capture device. The results indicate that achieving individual finger motion is possible and stimulation points can be changed via eye movements. The system is practical and can be used in hand motor training for stroke patients to shorten the rehabilitation period.