I think youre on to something here.
My "theory" has always been that this was a result of some form of entrapment neuropathy leading to this. Would love to hear some other docs weigh in on this.
I'm not a doc, but I do have experience with dealing with TOS. I've asked several docs, and in my experience they've initially identified it as carpal tunnel after running me through the 3 or 4 basic test, which did identify a nerve issue. I was pretty sure it wasn't so I looked further. I didn't get to a good ortho (been waiting 6 months) so I did a lot of research, read a lot of boards, and listened to my body and things have been progressing.
Effective stretching, some nerve flossing and trigger point therapy, particularly at the pec/delt insertion and the general area below the anterior delt.(basically the thoracic outlet area) is working for me and I'm getting full feeling to the tips of all my fingers. Overhead movements aggravate the problem; general movements involving the arms can exacerbate the issue over time if not identified and resolved early enough. I'm certain the problem originates in the chest shoulder area with nerves becoming restricted within soft tissue. Those are just some of my observations.