In the observation group , beside the basic treatment , EA was applied to bilateral Ezhongxian ( MS 1 ) , Dingzhongxian ( MS 5 ) , Dingniehouxiexian ( MS 7 ) , Hegu ( LI 4 ) , Taichong ( LR 3 ) , Zusanli ( ST 36 ) , Taixi ( KI 3 ) , Xuanzhong ( GB 39 ) and Fengchi ( GB 20 ) .