The Gluteus medius originates on the outer surface of the ilium (see image below), just below the crest and inserts on the greater trochanter of the femur. Or in other words, it originates on the pelvis and attaches to the large ball on the outside of the femur. This glute medius is a broad muscle that narrows towards its tendon giving it a fan-shape (as you can see from above). The larger Gluteus MAXIMUS overlaps the muscle posteriorly. The glute medius is about half the siz