Which muscle inserts at the trochanteric fossa?

The muscle that inserts at the trochanteric fossa is the obturator externus. This muscle is located in the deep posterior compartment of the hip and has the specific function of laterally rotating the thigh, stabilizing the hip joint, and assisting in abduction of the thigh when the hip is flexed.

The trochanteric fossa is a pit located on the femur, just below the greater trochanter, and serves as an attachment point for several muscles involved in hip movement and stabilization. Obtaining the correct attachment for the obturator externus at this site enhances its function in facilitating lateral rotation.

Other muscles listed, such as the gluteus maximus, gluteus medius, and pectineus, have different insertion sites and functions. For instance, the gluteus maximus mainly inserts on the iliotibial tract and the gluteal tuberosity of the femur, playing a key role in hip extension and external rotation. Conversely, the gluteus medius is primarily responsible for hip abduction and stabilizes the pelvis during walking and running, with its insertion on the greater trochanter. Pectineus, on the other hand, is involved in hip