SIJ Eval & Treat Flashcards
Lumbo-Pelvic-Hip Complex
-isolated SIJ dysfunction is rare
-check with hip and/or lumbar exams
Sacroiliac Joint
-load tranfers from lumbar to pelvis to hips
-contributes to 15-30% of non-specific LBP
Sacrum
-5 fused vertebra
-concave on anterior side, convex on posterior
-attachment for Piriformis, glutt max, ER, multifidi, TL fascia
-L shaped facet with innominate, noncongruent
Base: articulates with :L5
Apex: articulates w/ coccyx
Ala: articulates w/ ilium
Innominates
-ischium, ilium, and pubic bone fused together at the acatabulum
-articulates with the sacrum= SIJ
Anterior SIJ Ligaments
-binds sacrum to ilia
-limits all motions
-pain generators
Interosseous Ligs
-most important
-thick
-binds sacrum to ilia posteriorly
-limits ant and inf movements of sacrum
Posterior SIJ Ligs
-easily papable
-limit ant iliac rotatation (or sacral counternutation)
-attachment for: ES, glute max, TL fascia
-pain generators
Sacrotuberous Lig
-isch tub to PSIS
-limits post iiac rotation (sacral nutation)
Sacrospinous Lig
-ischual spine to sacrum
-limits post iliac rotation (sacral nutation)
Pubic Symphysis
-transfer loads
-connected by fibrocartilage
-common source of groin pain
Pelvic Floor Muscles
-assist im lumbosacral stability
-increase intra-abdominal pressure
Muscles that can produce SIJ motion…
-piriformis
-Pubococcygeaous
2/35 SIJ muscles
Posterior Oblique System
-lats, contra glue max, L fascia
-helps with SLS
Anterior Oblique System
-EO/IO, contra hip add and abdominal fascia
-helps wih SLS
Lateral Muscle System
-Glute med/min and contra hip add
Inner Muscle System
-multifidi, pelvic floor, and diaphragm
-stabilize SIJ
-pressure management
Nerve Supply of SIJ
Anterior portion : Post rami L2-S2
Posterior portion: post rami L3-S3