do you really think posterior scalene tightness could cause a cascade that presents as frozen shoulder? I could see neurogenic symptoms due to compression on the brachial plexus or pain that limits motion or inhibition of muscles in the area, but why would a person lose passive ROM in all directions?
I don't necessarily know if I would have needed to get that specific in terms of which head of the scalene it is, it's not like you can ask the person to just move the posterior head and not the other 2 LOL.
But in terms of some area causing a cascade of problems into other areas, oh sure absolutely. Those are my typical patients.
By why would it cause a loss of passive ROM, I guess I couldn't fathom one unless I saw the person. I've seen stranger things with "weirder" symptoms believe me.
But in the end, it doesn't really matter eh? If you restored the patients function and reduced their pain, then you've done your job. You put that patient in the back of your mind the next time you come across another difficult "frozen shoulder" diagnosis.