Anatomy Week 5 - Anatomy of the pelvis

Question 1

What is the difference between the male and female pelvis?

Answer 1

• Males have a wider pelvis
• Oval shaped pelvic inlet
• 90 - 100 angle on the pubic arch
• Females have a narrower pelvis
• Heart shaped pelvic inlet
• 60 - 70 angle on the pubic arch.

Question 2

What are the three bones that the Pelvis consists of and what type of cartilage is involved?

Answer 2

1. Ischium
2. Ilium
3. Pubis

Triradiate cartilage separates the bones prior to puberty-fusion begins at age 15-17 years.

Question 3

Describe the bony landmarks of the Ilium.

Answer 3

It is the largest and widest pelvic bone.
- Superior margin is the iliac crest
- Forms the Anterior Superior Iliac
Spine (ASIS)
- Posterior aspect is the Greater sciatic notch

Question 4

Describe the bony landmarks of the pubis.

Answer 4

• Most anterior portion of the hip bone.
• Body
• Located medially, it articulates with the opposite pubic body at the pubic symphysis.
• Superior ramus
• Extends laterally from the body to form part of
  the acetabulum.
• Inferior pubic ramus
• Projects towards the ischium.

Question 5

Describe the bony landmarks of the ischium.

Answer 5

• Forms the posteroinferior part of the hip bone.
• Ischial tuberosity
• The posteroinferior aspect of the Ischium.
• Ischial spine
• A posteromedial projection of bone near the junction of the superior ramus and the Ischium body.
• Inferior ischial ramus combines with the inferior pubic ramus forming the ischiopubic ramus.