Which action is associated with the gluteus maximus in addition to extending the thigh?

Which action is associated with the gluteus maximus in addition to extending the thigh?

• A. Abduction
• B. Flexion
• C. Medial Rotation
• D. Lateral Rotation

Answer: (D)

Gluteus maximus is a powerful hip extensor that also produces external (lateral) rotation of the thigh. Its posterior fibers pull the femur backward and rotate it outward, which is especially evident when rising from a chair, climbing stairs, or pushing the thigh back in locomotion. This action distinguishes it from muscles that flex the hip or medially rotate the thigh, which are handled by other muscles like the iliopsoas for flexion and the gluteus medius/minimus for medial rotation.

Gluteus maximus is a powerful hip extensor that also produces external (lateral) rotation of the thigh. Its posterior fibers pull the femur backward and rotate it outward, which is especially evident when rising from a chair, climbing stairs, or pushing the thigh back in locomotion. This action distinguishes it from muscles that flex the hip or medially rotate the thigh, which are handled by other muscles like the iliopsoas for flexion and the gluteus medius/minimus for medial rotation.