Which muscles are the prime movers for hip abduction?

Which muscles are the prime movers for hip abduction?

• A. Gluteus medius & Gluteus minimus
• B. Tensor fasciae latae
• C. Gluteus maximus
• D. Piriformis

Answer: (A)

The action of moving the leg away from the midline at the hip is produced mainly by the gluteus medius and gluteus minimus. These two muscles sit on the lateral pelvis and attach to the greater trochanter, allowing them to pull the thigh outward and stabilize the pelvis during weight-bearing activities. They are the primary abductors, which is why they’re considered the prime movers for hip abduction. The tensor fasciae latae can assist with abduction, but it also flexes and medially rotates the hip, so its role is secondary rather than primary. The gluteus maximus chiefly extends and externally rotates the hip, with only a limited, non-primary contribution to abduction. The piriformis is a deep external rotator that can assist in abduction when the hip is flexed, but it is not a primary abductor.

The action of moving the leg away from the midline at the hip is produced mainly by the gluteus medius and gluteus minimus. These two muscles sit on the lateral pelvis and attach to the greater trochanter, allowing them to pull the thigh outward and stabilize the pelvis during weight-bearing activities. They are the primary abductors, which is why they’re considered the prime movers for hip abduction.

The tensor fasciae latae can assist with abduction, but it also flexes and medially rotates the hip, so its role is secondary rather than primary. The gluteus maximus chiefly extends and externally rotates the hip, with only a limited, non-primary contribution to abduction. The piriformis is a deep external rotator that can assist in abduction when the hip is flexed, but it is not a primary abductor.