Functional pelvic girdle parts
Muscles associated with lower extremity that cross the hip joint (17)
Role of the pelvic girdle
Lumbar fusion affects on pelvic girdle
- causes predictable pathology in pelvic joints
SIJ joint type
combination of diarthrosis and synarthrosis (syndesmosis)
-planar joints - biaxial diarthroses allowing for gliding
Pubic symphysis movement
Intrinsic ligaments
Short posterior sacroiliac ligament
Long posterior (dorsal) ligament
Posterior interosseous ligament
- forms part of posterior joint capsule
Extrinsic ligaments
Sacrotuberous and sacrospinous ligaments
Iliolumbar ligament
Hypermobility vs. instability
SI CPR 1
3 of 5 tests +
Sn 0.91, Sp 0.87
SI CPR 2
3 of 5 tests +
Sen. 0.85, Sp 0.79
Diagnosing SIJ pain
Laslett SI cluster
Sn 0.91, Sp 0.87 3/5 tests +
Fortin finger test
-patient points to region of pain with one finger consistently and is within 1 cm of psis
Distraction (gapping)
Compression (approximation)
Thigh thrust
Gaenslen test
Patellar-pubic percussion test
-assessing for fracture