Pelvic Articulations Flashcards
Name the synovial joint of the pelvis
Sacroiliac joint
The sacroilliac joint is a ____ synovial joint joining ____ surfaces
Plane
Auricular
What is the function of the sacroiliac joint?
Due to ligaments = ___ motion capability
Load transfer btwn spine (shock absorption) + lower extremity (converts torque)
Low
Name the 3 supporting ligaments of the sacroiliac joint
Anterior, posterior, and interosseous sacroiliac ligaments
This sacroiliac ligament is the thinnest + weakest. What forms this ligament?
Anterior sacroiliac ligament
Ant. Thickening of fibrous joint capsule
This sacroiliac ligament is located on the posterior surface of the sacroiliac joint
Posterior sacroiliac ligament
This sacroiliac ligament is one of the strongest in the body
Interosseous sacroiliac ligament
Interosseous sacroiliac joint…
Is located deep to _________.
Connects tuberosities of ___ and ___.
Functions to prevent _________.
Posterior sacroiliac ligaments
Sacrum and ilium
Ant. + post. Displacement of SI joint
What component stabilizes the SI joint? Name the 3 Vertebropelvic ligaments. *Which two cross?
Syndesmoses
Iliolumbar ligament
*Sacrospinous ligament
*Sacrotuberous ligaments
Where is the iliolumbar ligament located?
TP of L5 to iliac crest
Where is the Sacrospinous ligament located?
Ischial spine to lat. surface of sacrum + coccyx
Where is the sacrotuberous ligament located?
Ischial tuberosity to lat. surface of sacrum + coccyx
Sacrotuberous and Sacrospinous ligaments cross creating the ___ + ___ ____ foramen. What is the function of these foramen?
Greater + lesser sciatic foramen
Passageways for nerves + arteries to lower extremity + gluteal region
This symphysis is located at the midline btwn pubis portions of the os coxae
Pubic Symphysis
What are the functions of the Pubic Symphysis?
Assist pelvis in absorbing body weight before forces travel to lower extremities (compressive forces)
Slight movement - can shift + rotate
