sacroiliac joint

Question 1

give the position of this joint and name the bones involved

Answer 1

postero-lateral aspect of the pelvis where the innonimate bones meet via the ilium with the sacrum

Question 2

what type of joint

Answer 2

synovial plane

Question 3

briefly describe the articular surfaces (2)

Answer 3

two articular surfaces have roughened elevations and depressions which compliment each other. sacral auricular surface is covered in hyaline cartilage. ilium auricular surface is covered in fibrocartilage

Question 4

3 ligaments associated with this joint

Answer 4

anterior sacroiliac ligament 
interosseous sacroiliac ligament
long and short posterior sacroiliac ligaments 
sacrospinous ligament 
sacrotuberous ligament

Question 5

movements at this joint

Answer 5

nutation sacrum moves forwards- closed packed position

counter nutation sacrum moves backwards

Question 6

what is the attachment of the interosseous sacro-iliac ligament

Answer 6

forms bond between ilium and sacrum (syndesmosis)

from posterior aspect of the auricular surface on the ilium to posterior aspect of auricular surface on sacrum

Question 7

what is the attachment of the ventral sacro-iliac ligament

Answer 7

lateral sacrum to medial aspect of the ilium

provides anterior stability

Question 8

what is the attachment of the sacrotuberous ligament

Answer 8

from PSIS to ischial tuberosity

Question 9

what is the attachment of the sacrospinous ligament

Answer 9

apex from spine of ischium to lateral margin of the sacrum and coccyx

Question 10

what is the attachment of the ilio-lumbar ligament

Answer 10

upper band- from transverse process of L5 to posterior aspect of iliac crest

lower band- transverse process of L5 to anterior sacrum

Question 11

the symphysis pubis ligaments and its classification

Answer 11

superior pubic ligament
inferior arcuate ligament
secondary cartilaginous joint