Sacrum

Question 1

Posterior sacroiliac ligament

Answer 1

Inferior fibers that start at S3 and S4 and ascend to the posterior part of the
internal lip of the iliac crest and the PSIS

Question 2

Sacrospinous ligament

Answer 2

Runs from the ischial spine to the lateral aspect of the sacrum

Question 3

Interosseous sacroiliac joint

Answer 3

The ligaments are found in between the sacrum and the ilium that fills the
irregular space on the posterosuperior aspect of the SI joint

Question 4

Long Dorsal ligament

Answer 4

Starts at PSIS and descends to the lateral aspects of S3 and S4

Question 5

superior transverse axis

Answer 5

the respiratory axis at the posterior aspect of S2

Question 6

middle transverse axis

Answer 6

the postural axis through the anterior aspect of S2.

Question 7

inferior transverse axis

Answer 7

pelvic/ilial axis through the inferior auricular surface of S3
-represents movement of ilia on the sacrum