Boundaries of ischiorectal fossa are
The boundaries of ischiorectal fossa: floor: deep transverse perineal fascia. medial wall: external anal sphincters/anal 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
Posterior : Perineal membrane
Anterior : Sacrotuberous ligament
Lateral : Obturator internus
Medial : Gluteus maximus
Abdomen and pelvis