SIJ Flashcards
1
Q
What kind of joint is Sacroiliac (SIJ)?
A
Synovial plane
2
Q
Movements
A
Nutation- sacrum moves forward into pelvis (close-packed)
Counter nutation- sacrum moves backwards (top of coccyx rotates posteriorly)
3
Q
Articular Surfaces of SIJ
A
- Sacral surface covered in hyaline cartilage
- Iliac surface covered in fibrocartilage
- Both surface roughened by elevations and depressions
- Capsule attached to margins of articular surfaces
- lined with synovial membrane
- thick/fibrous
4
Q
Supporting Ligaments
A
- Interosseous sacro-iliac (from post of ilium a.surf to sacrum a.surf)
- Ant/Post sacroiliac (post thicker/broader)
- Sacrospinous
- Iliolumbar
- Sacrotuberous
