Buttocks Anatomy  The hip region contains powerful muscles,
including the largest muscle in the entire body, the gluteus
maximus.  The gluteus maximus is the muscle that gives the
buttocks its familiar and recognizable shape.  This muscle of
the buttocks extends the thigh, while other muscles in the
buttocks such as the gluteus medius and minimus, work to keep
the pelvis level and swing the opposite side forward while
walking.  Related Injuries - Fracture of Pelvis  Related
Surgeries - Fractured Pelvis Repair  Referenced Material
Anatomica’s Body Atlas. (2002). San Diego, CA: Thunder Bay Press
(pg. 163)