Which nerve innervates the sartorius muscle?

Which nerve innervates the sartorius muscle?

• A. Obturator nerve
• B. Sciatic nerve
• C. Tibial nerve
• D. Femoral nerve

Answer: (D)

The main concept here is nerve supply of a thigh muscle in the anterior compartment. Sartorius is in the anterior thigh and is innervated by the femoral nerve (L2–L4). The femoral nerve travels through the femoral triangle and provides motor innervation to the muscles of the anterior compartment, including sartorius and the quadriceps. This explains why the femoral nerve is the correct choice. Obturator nerve serves the medial thigh adductors, not sartorius. The sciatic nerve (and its tibial branch) supplies the posterior thigh and most of the leg, not the sartorius.

The main concept here is nerve supply of a thigh muscle in the anterior compartment. Sartorius is in the anterior thigh and is innervated by the femoral nerve (L2–L4). The femoral nerve travels through the femoral triangle and provides motor innervation to the muscles of the anterior compartment, including sartorius and the quadriceps. This explains why the femoral nerve is the correct choice.

Obturator nerve serves the medial thigh adductors, not sartorius. The sciatic nerve (and its tibial branch) supplies the posterior thigh and most of the leg, not the sartorius.