W31/L7: Pelvic anatomy Flashcards
What muscle forms the lateral wall of the pelvis?
Obturator internis
What’s the course of OI?
Arises from internal surface of the obturator membrane and adjacent bone.
Exits via the lesser sciatic foramen into the gluteal region
What muscle forms the posterior wall of the pelvis?
Piriformis
What’s the course of piriformis?
Arises from the middle 3 parts of the sacrum and the adjacent parts of the lateral mass
Exits via the greater sciatic foramen to the gluteal region
Which three components form the pelvic floor?
Pubococcygeus
Iliococcygeus
Ischiococcygeus
Which components of the pelvic floor make the levator ani?
Pubococc’
Iliococc’
What is the lowest point in the peritoneal cavity in men?
The rectovesicular pouch
What’s the lowest point in the peritoneal cavity in women?
Pouch of Douglas
Where do the lateral fibres of pubococcygeus insert?
The anococcygeal raphe
What two slings does the pubococcygeus form?
Pubovaginalis / puboprostaticus
Puborectalis
Where do the fibres of iliococcygeus inset?
The anococcygeal raphe
