Which action describes the adductor magnus?

Which action describes the adductor magnus?

• A. Flexion of thigh
• B. Adduction and medial rotation of thigh
• C. Abduction of thigh
• D. Extension of thigh

Answer: (B)

Adductor magnus mainly works to bring the thigh toward the midline and rotate it inward. Its muscle fibers have two parts: the anterior/adductor portion mainly adducts and medially rotates the thigh, while the posterior/hamstring portion helps extend the thigh. Because the muscle’s overall action is best summarized as adduction with medial rotation (with extension contributed by the posterior part), that description fits best. Abduction is performed by the outer thigh muscles, and flexion isn’t the primary role of this muscle, though some fibers can influence thigh position depending on the joint angle.

Adductor magnus mainly works to bring the thigh toward the midline and rotate it inward. Its muscle fibers have two parts: the anterior/adductor portion mainly adducts and medially rotates the thigh, while the posterior/hamstring portion helps extend the thigh. Because the muscle’s overall action is best summarized as adduction with medial rotation (with extension contributed by the posterior part), that description fits best. Abduction is performed by the outer thigh muscles, and flexion isn’t the primary role of this muscle, though some fibers can influence thigh position depending on the joint angle.