The gluteus medius originates on the outer surface of the ilium bone and runs to the greater trochanter of the femur. This muscle acts to stabilize the pelvis when standing on one leg and during walking. The gluteus medius is also a primary abductor of the hip. Its anterior fibers act to synergize flexing and internally rotating the flexed hip; its more posterior fibers synergize extending and externally rotating the extended hip.
What is hip bursitis? Bursitis is irritation or inflammation of the bursa. A bursa is a fluid-filled sac that acts as a cushion between tendons, bones, and skin. There is a bump on the outer side of the upper part of the thigh bone (femur) called the greater trochanter. The trochanteric bursa is located over…
The Femur consists of four parts: the head, greater trochanter, lesser trochanter, and the lower extremity. Learn more about the vital role or femur on the bones of our legs. http://www.learnbones.com/leg-bones-anatomy/
In addition to the obvious upper buttock distribution of symptoms from pain and spasm in the gluteus maximus and gluteus medius, there may also be pain in the lateral thigh between the greater trochanter and the knee. This is because the tensor fascia lata muscle is also innervated by the superior gluteal nerve.
Trochanteric bursitis is inflammation of the bursa (a small, cushioning sac located where tendons pass over areas of bone around the joints), which lies over the prominent bone on the side of your hip (femur).
Piriformis Origin Sacrum Insertion Greater trochanter Artery Inferior gluteal , lateral sacral and superior gluteal artery, Nerve Nerve to the piriformis (L5, S1, and S2) Actions External rotator of the thigh