DeLtA 7UAAIn nA Posterior group of hip muscle 1-Gluteus maximus 2-Gluteus medius 3-Gluteus minimus 4-Piriformis Gluteus 5-Obturator internus Gluteus medius maximus 6 Gemellus sup 7 Gemellus inf 8 quadratus femoris 6 5 7 obt Copy Ri G-Department of Anatomy-Fudan UniversityCopy Right- Hongqi ZHANG-Department of Anatomy-Fudan University Copy Right- Hongqi ZHANG-Department of Anatomy-Fudan University 1-Gluteus maximus 2-Gluteus medius 3-Gluteus minimus 4-Piriformis 5-Obturator internus 4 5 Posterior group of hip muscle 6 Gemellus sup. 7 Gemellus inf. 8 quadratus femoris 6 7 8 Gluteus maximus Gluteus medius Gluteus minimus