In irradiation group the cilia of hair cells in macula utriculi became shorter the number of cilia and hair cells decreased and the otolith disappeared . The structure of crista ampullaris of control group was normal .

对照组壶腹嵴结构正常，照射组 壶腹嵴与对照组相比， 感觉 上皮变 薄，毛细胞数量减少，纤毛消失。