Pronunciation (OB-tu-ra-tur in-TER-nus) Origin/Proximal Attachment Internal margins of obturator foramen; obturator membrane Insertion/Distal Attachment Medial aspect of greater trochanter (through lesser sciatic foramen) Action/Relevance Externally rotate the thighAbducts thigh when flexed Innervation Nerve to obturator internus (L5, S1, 2) Notes Both gemelli fuse with the tendon of ob internus before its insertion. | 
