Walls and Floor of the Pelvis

Question 1

What is the origin of the pubococcygeus?

Answer 1

Internal aspect of pubic bone and first part of obturator internus

Question 1

Does the peritoneum drape over the vagina?

Answer 1

Yes, on the posteriosuperior surface

Question 2

How does the endopelvic fascia support the viscera of the pelvis?

Answer 2

It condenses into ligaments

Question 3

What are the three components of the pubococcygeus?

Answer 3

Pubovaginalis/puboprostageus - slings around the vagina and prostate

Puborectalis - slings around the rectum

Most lateral aspect - inserts into the anococcygeal raphe

Question 4

Where does pus in the peritoneal cavity collect in females?

Answer 4

The rectro-uterine pouch aka Pouch of Douglas

Question 6

Where does the obturator internus lie in the pelvis and perineum?

Answer 6

Half in each

Question 7

What is the name of the muscle that sits on the lateral wall of the pelvis?

Answer 7

Obturator internus

Question 7

What is levator ani? What are the names of its component muscles?

Answer 7

The two pelvic wall muscles that lift upwards

Pubococcygeus, Iliococcygeus

Question 8

Through which foramen does piriformis exit the pelvis?

Answer 8

Greater sciatic foramen

Question 8

What is the difference in the placement of loose and dense fascia?

Answer 8

Loose covers structures that move

Dense covers structures that are fixed

Question 8

How does the peritoneum relate to the pelvic viscera?

Answer 8

It drapes over the viscera

Question 9

Which ligament does the ischiococcygeal muscle follow?

Answer 9

Sacrospinous

Question 11

What is the name of the middle aspect of the pelvic floor?

Answer 11

Iliococcygeus

Question 11

What does the sacral plexus lie in relation to the piriformis and the endopelvic fascia?

Answer 11

It lies in between

Question 13

Where does iliococcygeus insert?

Answer 13

The anococcygeal raphe

Question 14

What closes the obturator foramen?

Answer 14

The obturator membrane

Question 15

What can be done for veterans that are unable to void due to an obstructive prostate?

Answer 15

Insert a needle through the abdominal wall directly into the bladder with a catheter to drain the bladder

Question 17

Does the pubococcygeus underlap or overlap the iliococcygeus?

Answer 17

Overlap

Question 17

What is the name of the lowest point in the peritoneal cavity in males? Where does it lie?

Answer 17

The retrovesical pouch

In between the bladder and rectum

Question 18

What are the clinical implications of the position of the Pouch of Douglas?

Answer 18

Fluid that collects within it can be palpated

A needle can be inserted into the vagina and fluid from the pouch can be aspirated

Question 19

Which way does the bladder expand as it fills with urine?

Answer 19

Upwards into the abdominal cavity

Question 21

What surrounds neurovascular structures in the pelvis?

Answer 21

Endopelvic fascia

Question 22

What is the origin of the ischiococcygeus muscle?

Answer 22

Ischiospine

Question 24

What branch of the internal iliac artery supplies the pelvis viscera?

Answer 24

The anterior branch

Question 25

What is the name of the major artery of the pelvis that lines in the lateral walls within fascia?

Answer 25

Internal iliac

Question 26

On which aspect of the pelvis does the piriformis lie?

Answer 26

Posterior

Question 27

What is the name of the fascia of the pelvis?

Answer 27

Endopelvic fascia

Question 28

What creates the rectoanal junction?

Answer 28

The slinging of puborectalis around the rectum