Which nerve provides motor innervation to the quadriceps femoris group?

Which nerve provides motor innervation to the quadriceps femoris group?

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

Answer: (A)

The nerve that provides motor innervation to the quadriceps femoris group is the femoral nerve. The quadriceps—rectus femoris and the three vastus muscles—form the anterior compartment of the thigh and are responsible for knee extension. The femoral nerve, arising from L2–L4, travels into the thigh under the inguinal ligament and gives muscular branches to all four quadriceps muscles, enabling their motor function. The other nerves don’t supply these muscles: the obturator nerve mainly innervates the thigh’s medial adductors, while the sciatic nerve (and its tibial and common fibular branches) supplies the posterior thigh muscles and most of the leg.

The nerve that provides motor innervation to the quadriceps femoris group is the femoral nerve. The quadriceps—rectus femoris and the three vastus muscles—form the anterior compartment of the thigh and are responsible for knee extension. The femoral nerve, arising from L2–L4, travels into the thigh under the inguinal ligament and gives muscular branches to all four quadriceps muscles, enabling their motor function. The other nerves don’t supply these muscles: the obturator nerve mainly innervates the thigh’s medial adductors, while the sciatic nerve (and its tibial and common fibular branches) supplies the posterior thigh muscles and most of the leg.