Pelvic Floor

Question 1

The pelvic floor is bounded anteriorly by the _____, posteriorly by the _____, and laterally by the ____.

Answer 1

genitals
anus
thighs

Question 2

All muscles of the perineum are innervated by what nerve?

Answer 2

pudnedal nerve

Question 3

What are the 4 muscles of the pelvic floor?

Answer 3

• Levator ani
• Coccygeus
• External urethral sphincter
• External anal sphincter

Question 4

2 Parts of the Levator Ani

Answer 4

Pubococcygeus

Iliococcygeus

Question 5

Where is the levator ani located?

Answer 5

it is a broad flat muscle that surrounds the anus

Question 6

What is the function of the levator ani?

Answer 6

to elevate the perineum and constrict the anus to hold in fecal matter

Question 7

Where does the coccygeus muscle originate and insert?

Answer 7

Originates on the ischial spine and inserts onto the inferior ends of the sacrum and coccyx

Question 8

What is the function of the coccygeus muscle?

Answer 8

to constrict the anus and hold fecal matter in the rectum

Question 9

Where does the iliococcygeus originate and insert?

Answer 9

arises from the inner side of the ischium and the posterior part of arch of the obturator and inserts onto the coccyx

Question 10

Where does the pubococcygeus originate and insert?

Answer 10

it is the hammock-like muscle that stretches from the pubic bone to the coccyx