The Femoral nerve (L2, 3,4) passes through the abdominal cavity lying on the groove between the iliacus and psoas major. Together, the femoral nerve and iliopsoas pass behind the inguinal ligament to enter the femoral triangle lateral to the femoral artery. Almost immediately the femoral nerve sprays out its branches. The cutaneous branches to the anterior thigh (intermediate and medial cutaneous nerves of the thigh), and the motor branches (from its lateral aspect) go directly to the sartorius, rectus femoris, vastus lateralis and vastus intermedius. Only two branches of the femoral nerve (the saphenous nerve, and the nerve to the vastus medialis) travel with the femoral artery.
The quadriceps reflex is associated with L3-L4.