Lecture 16, Sacral Ligaments

Question 1

Sacro-iliac joints

Answer 1

sacroiliac joints are strong, weight-bearing, compound joints consisting of an anterior and posterior synovial joint

Question 2

Anterior sacro-iliac ligament

Answer 2

thin and forms the anterior part of the fibrous capsule of the synovial joint

Question 3

Interrosseous sacro-iliac ligament

Answer 3

primary structures involved in transferring the weight of the upper body from the axial skeleton to the two ilia and then to the femurs during standing and to the ischial tuberosities during sitting (occupy an area of about 10cm2)

Question 4

Posterior sacro-iliac ligament

Answer 4

posterior external continuations of the interosseous sacroiliac ligaments

Question 5

Sacrotuberous & Sacrospinous ligaments

Answer 5

these ligaments allow only limited upward movement of the inferior end of the sacrum, thus providing resilience to the sacro-iliac region when the vertebral column sustains sudden weight increases

Question 6

Inguinal ligament

Answer 6

a set of two bands that connect the oblique muscles of the abdomen to the pelvis, deep in the groin
- they support soft tissues in the groin area and anchor the abdomen and pelvis.

Question 7

Superior pubic ligament

Answer 7

start on the superior part of the pubis and go as far as the pubic tubercles

Question 8

Inferior pubic ligament

Answer 8

thick triangular arch of ligamentous fibers connecting the 2 pubic bones below and the main function of the APL is to stabilize the symphysis pubis.

Question 9

Iliolumbar ligaments (lumbosacral joint)

Answer 9

unites the transverse processes of L5 to the ilia