I would say that this may be one of those cases where if it sounds sketchy, it may be sketchy. What I mean by that is anytime you have muscle loss(atrophy) you need to rule out possible nerve related causes. It sounds like you have seen PTs before but even PTs can miss underlying nerve problems. The area that you are having most of your symptoms and weakness is commonly associated with C5-6 nerve root compressions that can occur in the neck. I would recommend seeing your physician and having them check for a possible nerve compression first. 

It’s always better to be on the safe side with things like this.

Good luck,

Danny

MWOD Team Member