<prompt> Boundaries of ischiorectal fossa arePosterior : Perineal membraneAnterior : Sacrotuberous ligamentLateral : Obturator internusMedial : Gluteus maximus  <response>: The boundaries of ischiorectal fossa: floor: deep transverse perineal fascia. medial wall: external anal sphinctersanal canal; levator ani muscle. lateral wall: ischial tuberosity; obturator internus muscle; obturator fascia. apex: intersection of levator ani and obturator internus muscle ref - BDC vol2 pg415, researchgate.net 