Which muscle group is commonly tested as the primary abductor of the hip?

Which muscle group is commonly tested as the primary abductor of the hip?

• A. Gluteus medius and Gluteus minimus
• B. Rectus femoris
• C. Gracilis
• D. Sartorius

Answer: (A)

The main concept here is identifying which muscles are responsible for moving the thigh away from the midline at the hip. The primary hip abductors are the gluteus medius and gluteus minimus. These two muscles are positioned on the outer hip, attach to the greater trochanter, and their action is to pull the femur outward, producing abduction. They also play a crucial role in stabilizing the pelvis during single-leg stance, which is why they’re the key movers tested when assessing hip abduction strength. Rectus femoris is mainly a hip flexor and knee extensor, so it doesn’t provide the primary abduction action. Gracilis acts as an adductor, pulling the thigh toward the midline rather than away. Sartorius can assist with abduction when the hip is flexed, but it is not the primary abductor.

The main concept here is identifying which muscles are responsible for moving the thigh away from the midline at the hip. The primary hip abductors are the gluteus medius and gluteus minimus. These two muscles are positioned on the outer hip, attach to the greater trochanter, and their action is to pull the femur outward, producing abduction. They also play a crucial role in stabilizing the pelvis during single-leg stance, which is why they’re the key movers tested when assessing hip abduction strength.

Rectus femoris is mainly a hip flexor and knee extensor, so it doesn’t provide the primary abduction action. Gracilis acts as an adductor, pulling the thigh toward the midline rather than away. Sartorius can assist with abduction when the hip is flexed, but it is not the primary abductor.