QuestionSBA
QuestionChoice
The deep transverse perineal muscle forms part of the floor of the ischioanal fossa.
10040969
d
Deep transverse perineal muscle
QuestionChoice
The roof of the ischioanal fossa is formed by the levator ani muscles.
10040967
b
Levator ani
QuestionChoice
The lateral boundaries of the ischioanal fossa are the ischial tuberosities, obturator internus muscle and the obturator fascia.
10040966
a
Ischial tuberosity
QuestionChoice
The external anal sphincter forms part of the medial wall of the ischioanal fossa. This muscle encircles the anal canal and plays a crucial role in controlling defecation by regulating anal canal closure, while its position contributes to the structural integrity of the ischioanal fossa.
10040968
c
External anal sphincter
QuestionChoice
The perineal body forms the central, anterior portion of the base of the ischioanal fossa. It is a fibromuscular structure that provides critical support and attachment for several pelvic muscles, including the external anal sphincter and the deep transverse perineal muscle, contributing to pelvic floor stability.
10040970
e
Perineal body
Concept
Chapter
2693
6262
Ischioanal fossa
Topic
308
Pelvic anatomy
20492
Picture
3091
46 -Ischioanal fossa.png
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images/171vk59w1727763837267_512.jpg
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Topic
308
Pelvic anatomy
Which of the following marks the lateral boundary of the labelled structure?
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a