Cutaneous Innervation LE Lateral femoral cutaneous n. Anterior femoral cutaneous n. Posterior femoral cutaneous n. Obturator n. Infrapatellar branch of saphenous n. Lateral sural cutaneous n. Medial crural cutaneous branches of saphenous n. Sural n. Lateral sural cutaneous branch of common peroneal n. Superficial peroneal n. Deep peroneal n. Medial calcaneal branch of tibial n. Sensory / Motor Root Lesions L1 L2 -hip flexion and thigh adduction DDX: lumbar plexus palsy, HNP L3 -hip flexion and thigh adduction DDX: lumbar plexus palsy, HNP L4 -Vastus lateralis/medialis, rectus femoris, Tibialis Anterior, thight adduction -lumbar plexus palsy, HNP, femoral nerve palsy L5 -Tibialis Anterior, Peroneus longus, EHL, Tibialis Posterior, gluteus medius -sciatica, peroneal nerve palsy, HNP S1 -hamstrings, gasctroc -sciatica, HNP S2 S4,5 S3 L5