On the clarification of Right vs. Left SI Joint Dysfunction…
I wanted to clarify the PR clinical reasoning for a left SIJ sprain vs. right.
My understanding is the R SIJ is a posterior gapping issue because of the L AIC pattern, therefore, right glute max is the main muscle to activate for force closure and correct bilateral pelvic/hip position.
As for the L SIJ sprain, is the thinking that the L SIJ gaps anteriorly? Is this because of compensation on the left side to externally rotate the L hip, therefore, the ischiocondylar adductor is the main muscle to activate to get the L femur to internally rotate and stay in the acetabulum? As well as, left anterior glute med to internally rotate the left femur and right glute max to keep the left pelvis back? The L internal obliques and transverse abdominis will also help to anchor/stabilize the pelvis on the L side preventing L anterior SIJ gapping? Also with L femoral external rotation, the left posterior capsule would likely become short/restricted and therefore would warrant stretching? Lastly, the L adductors and R abductors would need activation/strengthening to help oppose the tendency for the L abductors and R adductors to take over and be hypertonic with the L AIC pattern and compensation? Please let me know if my thoughts are accurate or not.
You are ‘right on’! This is exactly what is happening with left and right SIJ sprain.
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