The patients will be assigned into one of three groups (A, B,C) by block randomization. All participants will receive regular traditional rehabilitation. In addition, three groups will receive an additional 3 weeks, 5 times per week, 30 minutes once daily, total 15 session. Group A: both tDCS and NMES conduct simultaneously for 30 minutes. Group B: combination of tDCS and sham NMES Group C: combination of sham tDCS and sham NMES.