And at 21 d after noise exposure, the stereocilia appeared perfectly normal and well defined in group B, where as there were still remained some abnormalities of stereocilia in group A.

• 在B组大鼠，外毛细胞静纤毛暴露2小时后有轻度扭曲及排列紊乱，3天后这些病变基本恢复，21天后外毛细胞静纤毛形态完全恢复正常。