Femoral nerve injury

The femoral nerve originates from the lumbar plexus and consists of the anterior and posterior femoral nerves of the lumbar 2, 3, and 4 nerves. It exits from the outer edge of the psoas major muscle and runs obliquely down the deep side of the fascia fascia. After reaching the femoral fascial sheath, the diaphragmatic branch and psoas major branch were issued in the popliteal fossa. The main trunk entered the femoral triangle from the muscle space through the deep side of the inguinal ligament and the surface of the iliopsoas. It was located outside the femoral artery. The femoral nerve passes through the groin 2 to 3 cm and divides the anterior and posterior branches. The anterior branch is divided into the medial femoral cutaneous nerve and the medial femoral cutaneous nerve, which innervates the skin of the anterior medial femur, and issues motor control to control the sartorius muscle and the pubic muscle; The posterior branch is first branched to the quadriceps femoris, and then a cutaneous nerve, the saphenous nerve, is branched. The saphenous nerve enters the adductor muscle tube from the femoral triangle with the femoral artery and vein. The fascia is penetrated from the lower end of the tube, and the knee is located behind the sartorius muscle.