During incision & drainage of ischiorectal abscess, which nerve is/are affected/injured-

During incision & drainage of ischiorectal
abscess, which nerve is/are
affected/injured:
a) Superior rectal nerve
b) Inferior rectal nerve
c) Superior gluteal nerve
d) Inferior gluteal nerve
Correct Answer - B
B i.e. Inferior rectal nerve
Through a posterior horse shoe shaped recess both ischiorectal
fossae are connected behind the anal canal; so a unilateral abscess
may become bilateral.
During dissection of ischio rectal fossa, inferior rectal, pudendal,
posterior scrotal or labial nerve & vessels along with perforating
branches of S2-S3 and perineal branches of S4 nerve may get
damaged