I. Introduction
At present, the number of paralysis caused by central nervous system (CNS) injury is increasing, it seriously affect people's quality of life. Clinical and basic studies show that the brain's function can be reorganized dependent plasticity after injury. Rehabilitation training can provide effective cranial nerves stimulation which enables the brain cortex under reorganization store the correct movement pattern and finally recover the limb movement function [1]. Based on this, laboratories and rehabilitation centers worldwide have developed various rehabilitation training devices [2]–[13].