Objective:To study kinetics of T lymphocyte subsets in the peripheral blood of rats following repetitive mild traumatic brain injury(rm TBI) and its role in pathogenesis of rm TBI.Methods:Controlled cortical impact(CCI) induced brain injury model.SD rats were randomly assigned to five experimental groups:sham group and 1/2/4/6-week post-injury groups with 8 rats in each group.T lymphocyte subsets in the peripheral blood of the rats were analyzed after rm TBI by flow cytometry.Results:Flow cytometric analysi...