Blood vessels of gluteal region Observe the sciatic n 匈腰筋膜 thoracolumbar fascia 臀大肌 gluteus maximus 臀上动脉深上支 deep superior branch of 臀中肌 gluteus medius 臀上动脉深下支 臀小肌 deep inferior branch of gluteus mir superior gluteal a 梨状肌 臀上神经 piriformis rior gluteal 阴部神经 坐骨神纟 sciatic n Infrapiriformis Structures pudendal n 闭孔内肌驶 From lat to med.: 阴部内动脉 nternal pudendal a. tendon of obturator 后皮神经 股方肌 1. Sciatic n quadratus femoris cutaneous n 会阴支 co m peroneal n 2. Post. cutaneous femoral n peroneal branck tibial n 3. Infrapiriformis bv&n 大收肌 股二头肌长头 adductor magn long hesd of biceps femoris 4. Pudental bv& nn Cut gluteus magnusInfrapiriformis Structures From lat.to med.： 1. Sciatic n. 2. Post. cutaneous femoral n. 3. Infrapiriformis BV & n. 4. Pudental BV & nn. Cut gluteus magnus Blood vessels of gluteal region Observe the sciatic n