The patient presented with loss of extension at knee joint with decreased sensation over anterior aspect of thigh. The nerve damaged is:
Femoral nerve supplies the extensors at knee joint and skin over the anterior aspect of thigh as well. Injury of the femoral is uncommon but may be injured by a stab, gunshot wounds, during hip operations or a pelvic fracture leading to - Motor loss: Poor flexion at the hip joint, because of paralysis of the iliacus and saorius muscles. Inability to extend the knee, because of paralysis of the quadriceps femoris. Sensory loss: over the anterior and medial aspects of the thigh over the medial side of the leg and foot up to the back of the great toe
Obturator
Femoral
Common peroneal
Tibial
Nerve supply of Lower Limb