hi,
interesting point...however, some bold assertions are made in your post...like the majority of patients have a 'stuck'
SIJ...
...in fact, in my experience, the majority of patients have poor motor control. There are very few "stuck SIJs" out there i am afraid - but i do come across them from time to time.
The sympoms of a stuck SIJ in my opinion are:
1. inability to bear weight on the affected side IF the joint is stuck (fixated) in a "subluxed" position (for want of better terms!) - if is it stuck as in fused or fibrosed etc, it might actually be in a closed pack position in which case it will bear weight just fine thank you very much.
2. SIJ joint glide testing will reveal the affected SIJ WILL NOT move in the primary direction it is fixated in and may or may not move in the other direction - the SIJ has 2 arms to the joint - it is "j-shaped". And on a sidebar, most people do their SIJ joint testing with WAY TOO MUCH FORCE - the joint moves only a few degrees and a few mm in gliding - try to remember that.
3. on ASLR, a fixated joint may respond WORSE to compressions - either manually or with a belt because the joint is usually painful
4. on stork testing, the PSIS and S2 will not move relative to one another no matter what you do - true fixated joint is just that - doesn't move.
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i am presuming you might be an author of this 'new research' - i think what you will need to do is highlight the fact that most problems are motor control driven and that physios have been using misnomers to describe what they are seeing.
Why treatment for a "fixated joint" or "stuck SIJ" or any joint for that matter works (when the real problem is motor control) is because the manipulation/manual therapy often gives a neurophysiological effect and causes some relaxation of the gripping global muscles. Then once that is done, you can do the local muscle stabilisation - which will address the real motor control problem anyway. Therefore, the therapist has now reinforced their belief that they got the diagnosis right...when it was technically wrong - BUT the patient got better so what is the concern?? I personally prefer to be technically and practically correct!!
As for your APAS, i have found your entry here...
Asymmetric pelvic angle syndroms, APAS - Injury Update Forum. What you describe is certainly not new my friend but kudos to you for working it out on your own...BTW, a syndrome is what you call something when you don't know why it is happening - in other words, in the absence of a definition/diagnosis. I have the diagnosis for you...Motor Control Dysfunction. Read Diane Lee's textbook on the The Pelvic Girdle 3rd edition and don't forget to include that reference in your research paper...otherwise you are ignoring a major player in pelvis treatment!!
As for your research, you assert that you had 100% false positive on stork test using your ABD test. A problem might be your sample size. Another problem might be palpation error - there is enough research to suggest that the stance phase of stork is reliable but not sure about the swing/hip flexion phase which is where your test would fall. You may want to do your research overseas where they use RSA and XRay to determine true bony movements.
If you are interested in letting me read your findings, please feel to email or PM me.
I hope what i have written helps...
Cheers