<prompt> Levator ani muscle includes all exceptPuborectalisIshicoccygeusIliococcygeusPubocervicalis  <response>: the levator ani muscle is divisible into a pubococcygeus pa , an iliococcygeus pa and an ischiococcygeus pa. the pubococcygeus pa consists of 3 types of fibres they are anterior fibres, middle fibres constitute the puborectalis, posterior fibres. Ref : B D Chaurasias Human Anatomy , seventh edition, volume 2 , pg. no. 460 