1　资料与方法　在制作人体解剖标本时 ,发现一成年男尸的双侧臀大肌变异。臀大肌下方深层见一独立的肌束 ,肌外膜完整 ,肌纤维方向与臀大肌纤维方向基本一致 ,起点均偏下 ,起于骶骨背面下方及尾骨背面 ,肌纤维由内上向外下行走 ,最后与臀大肌的肌腱融合 ,止于髂胫束。著者取变 1 Materials and Methods In the production of human anatomy specimens, found a male adult male bifidus muscle variant. Under the gluteus maximus, an independent muscular bundle was seen in the deep layer. The myometrium was intact. The direction of the muscular fibers was basically the same as that of the gluteus maximus. The starting points were both lower and lower, starting from the back of the sacrum and the back of the tailbone. The muscle fibers walked from inside to outside, Finally, gluteus tendon fusion, only in the iliotibial bundle. Author change