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Question 1

What is the innervation of the levator ani muscles?

Answer 1

Pudendal nerve (roots s2, 3, 4)

Question 2

What are the three muscles of the levator ani?

Answer 2

Pubococcygeus

puborecatlis

iliococcygeus

Question 3

Label

Answer 3

Question 4

What is the main function of the puborecatlis muscle and what does its contraction do?

Answer 4

Main: Maintain fecal continince

Contraction: Forms the anorectal angle at the anorectal junction (the 90 degree angle)

Question 5

What is the main constituant of the levator ani?

Answer 5

The pubococcygeus

Question 6

Where does the iliococcygeous muscle start?

Answer 6

at the ischial spine

Question 7

What is the function of the iliococcygeal muscle?

Answer 7

To elevate the pelvic floor and the anorectal canal

Question 8

What is the coccygeus innervated by?

Answer 8

The anterior rami of S4 and S5

Question 9

What are the two muscles of the pelvic floor that are most pronet to injury during cervical child birth?

Answer 9

The puborectalis and pubococcygeus muscles

Question 10

What muscles support the fetal head during child birth?

Answer 10

Levator ani

Question 11

Where do the levator ani muscles and the coccygeus orginate from and where do they end?

Answer 11

Coccygeus: Originates from the ischial spines and terminates at the lateral side of the coccyx and sacrum along the sacrospinous ligament

Puborectalis: From the

Pubococcygeus From the pubis to attaching at thecoccyxandanococcygeal ligament.

Iliococcygeus From the ischial spine to the coccyx and anococcygeal ligament