The ABR threshold shifts in the NGF group 3 hurs,3 days,11 days,and 21 days after the blast exposure were significantly smaller than those in the NS group.

• 爆震后 3d NGF组 ABR反应阈恢复较生理盐水组显著快 ,2 1d后 ,NGF组 ABR已恢复正常水平 ,而生理盐水组未能恢复正常水平。