Objective To investigate the expression changes of Nogo-A in rat brain with diffuse axonal injury(DAI)and discuss the significance and mechanisms of Nogo-A in axon regeneration after DAI.Methods We divided 42 male SD rats of SPF grade into 7 groups randomly:the control group,DAI 2 h group,DAI 6 h group,DAI 12 h group,DAI 24 h group,DAI 72 h group and DAI 7 d group,with6 rats in each.The DAI animal models were established using the rat head coronal plane moment rotation acceleration vulnerant equipment.Then ...