Dimarie or ginneybean might have an idea - I know ginneybean did have the winging scap & a surgery to repair it.
she hasn't posted for about a month or 2 i think.

we have many of the old anatomy links in the stickys up above if that might help to track it down.

I can't recall if any of the scalenes would affect the scap nerve { can't recall the name of that nerve either}