Laurie
Go on Google or another search engine and look up TOS
(Thoracic outlet syndrome)..There are several causes for it,
one of which is slumping posture...Could also be a neck prob
I guess also..
From what I've been told there are two groups of nerves,plus
blood flow going through this region of the back...One nerve
group being pinched caues top of arm,thumb and index finger
to go numb,other set causes bottom of arm and pinky to"bad finger"
to lose feeling...Nerves are easier to pinch,because blood has
pressure to keep it flowing...
One simple test you can do is raise your hands above your
head,TOS will cause hands to go numb pretty quick....
I am no MD,it is just my experience in arms and hands going
numb,along with explanation by Neuro and Vascular Docs...
If you can make it go away by standing straight,by all means
stand as straight as you can.....Good Luck!!!!

David
