Which nerve innervates sartorius?

Which nerve innervates sartorius?

• A. Femoral
• B. Obturator
• C. Tibial
• D. Common fibular

Answer: (A)

Innervation of the sartorius follows the pattern of the anterior thigh muscles. The sartorius sits in the anterior compartment and is supplied by the femoral nerve, which carries motor fibers from L2–L4 to muscles in this compartment. This nerve also innervates the quadriceps group, supporting actions like hip flexion and knee extension. The obturator nerve targets the medial thigh adductors, not the sartorius. The tibial and common fibular (peroneal) nerves come from the sciatic nerve and mainly serve the posterior compartment and lower leg muscles. So, the nerve that innervates sartorius is the femoral nerve.

Innervation of the sartorius follows the pattern of the anterior thigh muscles. The sartorius sits in the anterior compartment and is supplied by the femoral nerve, which carries motor fibers from L2–L4 to muscles in this compartment. This nerve also innervates the quadriceps group, supporting actions like hip flexion and knee extension. The obturator nerve targets the medial thigh adductors, not the sartorius. The tibial and common fibular (peroneal) nerves come from the sciatic nerve and mainly serve the posterior compartment and lower leg muscles. So, the nerve that innervates sartorius is the femoral nerve.