In the treatment group , 5-hydroxytryptamine ( 5-HT ) , noradrenaline ( NE ) and dopamine ( DA ) levels were increased significantly when compared with pretreatment ( P < 0.05 ) , especially of 5-HT and DA levels ( P < 0.01 ) ; Compared with the control group , 5-HT and DA levels were increased significantly ( P < 0.05 ) .