iliococcygeus (muscle)

il·i·o·coc·cyg·e·us (mus·cle)

[TA]
the posterior part of the levator ani; origin, tendinous arch of the levator ani muscle (obturator fascia); insertion, anococcygeal ligament and coccyx; action, resistance to increase intrapelvic pressure, postdefecatory elevation of anal canal.