Abstract: ObjectiveTo study the rehabilitation mechanism of acute cerebral infarction.Methods30 male Wistar rats were randomly divided into 3 groups:group A(sham group),group B(model group) and group C(rehabilitation group).Animal model was made by the middle cerebral artery occlusion(MCAO).For each group,Bederson Neural Function was scored and balancing wood,rotating bar,and net screen were tested24 hours,3 days and 7 days after operation respectively.The nerve growth factor(NGF),brain derived neurotrophic factor(BDNF),transforming growth factor(TGF),basic fibroblast growth factor(bFGF)in brain tissues were tested.ResultsBederson neural function scores of group A had no changes,while those of the other two groups increased after 24 hours and had a tendency to restore gradually with time continuing,but indicated significant differences at each time,compared with group A(P<0.01).The abilities of grasping ,walking and coordinating of all the groups after 24 hours by operation handicapped,and there was no difference among the groups(P>0.05);with time continuing,every function of group A restored soon and that of group B or C improved,to some degree,but showed significant difference to group A(P<0.01).After 3 days by operation,balancing wood test of group C was better than that of group B(P<0.05);after 7 days,except Bederson neural function score,there was difference between the group C and B,that is,the former was superior to the latter. After 7 days by operation,there were a few NGF,BDNF,TGF and bFGF expressions in hippocampus and cortex areas of group A and B,and there was no difference between this two groups(P>0.05),while those of group C greatly increased,compared with group A and B(P<0.05-0.01).ConclusionsRehabilitation therapy can improve the MCAO rats' ability of equilibrating,grasping and walking and strengthen the myodynamia,as well as induce the expression of NGF,BDNF,bFGF and TGF in cortex and hippocampus.

Key words: cerebral infarction, rehabilitation, neurotrophic factors(NTFs), rats