NEET PG Medical – 2015 – Question – 25
Lateral border of ischiorectal fossa is formed by?
a) Gluteus maximus
b) Perineal membrane
c) Pelvic diaphragm
d) Obturator internus
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Correct Answer – D
Ans. is ‘D i.e., Obturator internus
Boundaries of ischioanal (ischiorectal) fossa are :-
- Anteriorly :- Posterior border of perineal membrane .
- Posteriorly :- Gluteus maximus muscle, sacrotuberous ligament.
- Laterally :- Ischial tuberosity and obturator internus.
- Medially :- Sphincter anal externus (external anal sphincter) and pelvic diaphragm (levator ani).
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