My cold hands and fingers are due to vaso-spasms. I have moderate compression of the artery when my arms are placed in hyper-abducted positions, but this in no way means I have ATOS. People in the non-symptomatic population can and do get compression as well.

The nerves are sending the signals for cold and for a long period of time I had a redish/blue discoloration as well. Since manual therapy, the discoloration has disappeared, but I'll still get cold hand and fingers but not as frequently.