Which muscle is used during adduction of the lower extremity toward the midline?

Which muscle is used during adduction of the lower extremity toward the midline?

• A. Adductor Longus
• B. Adductor Magnus
• C. Gracilis
• D. Pectineus

Answer: (B)

Adduction toward the midline is carried out by the medial thigh muscles, the adductors. Among them, the adductor magnus is the primary and strongest mover for pulling the thigh inward. Its fibers generate the main force causing adduction, while also having actions that flex or extend the thigh depending on the part of the muscle. The other muscles listed can contribute to adduction but are not the primary adductors: adductor longus aids adduction and flexion, gracilis assists with adduction and knee flexion, and pectineus helps with adduction and flexion. So the adductor magnus best explains the action of moving the leg toward the midline.

Adduction toward the midline is carried out by the medial thigh muscles, the adductors. Among them, the adductor magnus is the primary and strongest mover for pulling the thigh inward. Its fibers generate the main force causing adduction, while also having actions that flex or extend the thigh depending on the part of the muscle. The other muscles listed can contribute to adduction but are not the primary adductors: adductor longus aids adduction and flexion, gracilis assists with adduction and knee flexion, and pectineus helps with adduction and flexion. So the adductor magnus best explains the action of moving the leg toward the midline.