<prompt> Pudendal nerve supplying motor pa to external anal sphincter is derived from:L5-S1 rootsS1-S2 rootsL2-L3 rootsS2-S3 roots  <response>: Pudendal nerve supplying motor pa to external anal sphincter is derived from S2-4 roots. It provides motor innervation to perineal muscles, sphincter urethrae and levator ani. It is sensory to genitalia.Tibial nerve L5, S1-3- It is motor to most of the posterior thigh, posterior leg and plantar surface of the foot.Lateral femoral cutaneous nerve L2,3 - It is sensory to the lateral thigh.Femoral nerve L2-4- It is motor to iliacus, psoas major, psoas minor, and muscles of the anterior thigh.Common peroneal nerve L4-5, S1-2 - It is motor to the sho head of biceps femoris, muscles of the lateral leg, anterior leg and dorsum of foot superficial and deep peroneal branches.Superior gluteal nerve L4,5 S1- It is motor to the gluteus medius and minimus, and the tensor fascia lata.Inferior gluteal nerve L5, S1-2- It is motor to gluteus maximus.Ref: Coloring Guide to Human Anatomy By T. Alan Twietmeyer, page 104. 