Joints Of The Pelvis

Question 1

What joint forms from the articulation of L5 and S1?

What type of joint is this?

Answer 1

Lumbosacral joint.

Cartilaginous

Question 2

What ligament supports the lumbosacral joint?

Answer 2

Iliolumbar ligament

Question 3

Iliolumbar ligament connects from where to where?

What does it do?

Answer 3

TVPs of L4 and L5 to posterior iliac crest.

Key stabilizer of L5, limits lateral flexion

Question 4

What joint forms from the articulation of apex of sacrum with base of coccyx?

Answer 4

Sacrococcygeal joint

Question 5

Where is the SI joint ?

Answer 5

Auricular surface of sacrum articulates with auricular surface of ilium.

Question 6

What type of joint is the SI joint? What movements occur at it?

Answer 6

Synovial joint. Limited gliding and rotational movements available

Question 7

What ligaments support the SI joint? Where do they connect?

Answer 7

Anterior/ posterior sacroiliac ligaments. Ilium to sacrum.

And interosseous sacroiliac ligaments - lie just deep (anterior) to posterior SI ligaments

Question 8

What are the strongest ligaments in the body?

Answer 8

Sacroiliac ligaments

Question 9

What are the two accessory ligaments to the SI joint?

Answer 9

Sacrotuberous and sacrospinous ligaments

Question 10

What is the adjacent public bones with disc in between called?

Answer 10

Symphysis pubis