Sacroiliac Joint

Question 1

Type and variety

Answer 1

Synovial, plane

Question 2

Articulating surfaces

Answer 2

1. Auricular surfaces of ilium and sacrum
2. Both extend down to S3 middle in male and to S2 lower border in female

Question 3

Fibrous capsule

Answer 3

Attached to margins of auricular surfaces

Question 4

Ligaments

Answer 4

1. Anterior sacroiliac ligament
2. Posterior sacroiliac ligament
3. Interosseous sacroiliac ligament
4. Iliolumbar ligament
5. Sacrotuberous ligament
6. Sacrospinous ligament

Question 5

Anterior sacroiliac ligament

Answer 5

1. Weak ligament
2. On joint anterior aspect
3. Attached to ilium preauricular groove and sacrum side

Question 6

Posterior sacroiliac ligament

Answer 6

1. On joint dorsal aspect
2. Connects posterior superior iliac spine to sacrum lateral crest

Question 7

Interosseous sacroiliac ligament

Answer 7

1. Strong ligament in body
2. It is important in body weight transmission and fills space between iliac tuberosity and sacrum

Question 8

Iliolumbar ligament

Answer 8

Extends from iliac crest to L5 transverse process

Question 9

Sacrotuberous and sacrospinous ligaments

Answer 9

Considered sacroiliac joint secondary ligaments