Lecture 27: Bony Pelvis and Pelvic Wall

Question 1

What composes the bony pelvis?

Answer 1

2 hip bones
Sacrum
Coccyx

Question 2

What composes the os coxae?

Answer 2

Ischium
Ilium
Pubis

Question 3

Where do the two os coxae articulate?

Answer 3

Anteriorly: Pubic symphysis
Posteriorly: Sacroiliac joints

Question 4

What are the two divisions of the pelvic region?

Answer 4

Pelvis major (false): above pelvic brim
Pelvis minor (true): below pelvic brim

Question 5

What forms the lateral pelvic wall?

Answer 5

Below pelvic inlet:

1) Obturator internus muscle
2) Sacrotuberous ligament
3) Sacrospinous ligament

Question 6

What makes up the pelvic floor?

Answer 6

Pelvic diaphragm:

• Levator ani
• Coccygeus muscles

Question 7

What are the three layers of pelvic fascia?

Answer 7

1. Diaphragmatic fascia
2. Visceral fascia
3. Parietal fascia

Question 8

What are the three types of urinary incontinence?

Answer 8

Overflow: bladder unable to empty properly
Stress: relaxed pelvic floor and increased abdominal pressure
Urge: Bladder oversensitivity

Question 9

What can cause urine to leak?

Answer 9

Weak pelvic floor muscles

Question 10

What muscle in the pelvic floor can be torn in childbirth that can lead to urinary incontinence?

Answer 10

Pubococcygeus muscle