<prompt> Nerve supply of obturator internus is byL1-L3L4-S1L5-S2S1-S3  <response>: OBTURATOR INTERNUS Fan-shaped Belly lies in pelvis and tendon in gluteal region.Action: lateral rotators of thigh at hip joint.supplied by nerve to obturator internus.Root value: L5,S1,S2Branches: obturator internus and superior gamellus.Reference: BDC 6E page no.173 