Joints Of Pelvis

Question 1

What are the four joints of the pelvis?

Answer 1

Sacroiliac
Hip
Lumbosacral
Pubic symphysis

Question 2

What ligaments are involved in the lumbosacral articulation (2)

Answer 2

• Lumbosacral (transverse process L5 to anterolateral aspect of ala of sacrum)
• iliolumbar (trans process of L5 lat to inner lip of post iliac crest

Question 3

Functions of symphysis pubis (2)

Answer 3

• Shock absorption

- increasing joint congruency

Question 4

Ligaments of the pubic symphysis (2)

Answer 4

Superior pubic ligament (crest to crest and tub to tub)
Inferior/actuate pubic ligament (ramus to ramus)

Both transverse ligaments with lateral fibres

Question 5

Ligaments of the sacroiliac joint including secondaries (5)

Answer 5

Anterior SI (pelvic surface of ilium to anterior aspect of ala of sacrum)
Posterior SI (tubercle of ilium to intermediate crest of sacrum via inf oblique fibres, surrounding sacral foramena)
Interosseus ligament (tubercle of ilium to post surface of sacrum)
Sacrotuberous (PSIS, PIIS, lower half dorsal sacrum, lower half lat sacral crest, lat margin of coccyx via oblique inf lat fibres to Ned aspect of ischial tuberosity)
Sacrospinous(inf lat half of sacrum to ischial spine)

Question 6

What passes through the greater sciatic foramen? (2)

Answer 6

• piriformis

- sciatic nerve

Question 7

What passes through the lesser sciatic foramen? (2)

Answer 7

• obturator internus

- obturator nerve

Question 8

Attachments of Inguinal ligament (2)

Answer 8

• ASIS

- pubic crest

Question 9

Attachments of iliolumbar ligament (2)

Answer 9

Transverse process of L5 to

Inner lip of posterior portion of iliac crest

Question 10

Attachments of lumbosacral ligament (2)

Answer 10

Transverse processes of L5

Anterolateral aspect of ala of sacrum

Question 11

Attachments of superior pubic ligament

Answer 11

Pubic ramus to ramus

Pubic crest to crest

Question 12

Inferior pubic ligament attachments

Answer 12

Inferior pubic ramus to ramus

Question 13

Attachments of interosseus sacroiliac ligament

Answer 13

Tubercle of ilium

Dorsal sacrum

Question 14

Attachments of anterior sacroiliac ligament (2)

Answer 14

Anterior aspect of ala of sacrum to pelvic surface of ilium

Question 15

Attachments of posterior sacroiliac ligament (2)

Answer 15

Tubercle of ilium

Intermediate crest of sacrum via inferior lateral oblique fibres (attaches around sacral foramena)

Question 16

Attachments of sacrospinous ligament (3)

Answer 16

Lower lateral half of sacrum
Lateral border of coccyx
To ischial spine

Question 17

Attachments of sacrotuberous ligament (6)

Answer 17

PSIS
PIIS
Lower half of dorsal surface of sacrum 
Lower half of lateral sacral crest
Lateral border of coccyx
Medial aspect of ischial tuberosity