conduit for obturator nerve obturator internus sciatic notch lesser sciatic notch incisura ischiadica minor SCTID:292830001 UBERON:0014436 Wikipedia:Lesser_sciatic_notch Below the ischial spine is a smaller notch, the lesser sciatic notch; it is smooth, coated in the recent state with cartilage, the surface of which presents two or three ridges corresponding to the subdivisions of the tendon of the Obturator internus, which winds over it. It is converted into a foramen, the lesser sciatic foramen, by the sacrotuberous and sacrospinous ligaments, and transmits the tendon of the Obturator internus, the nerve which supplies that muscle, and the internal pudendal vessels and nerve. FMA:16911