Working on neurology appointment now at North Carolina State University Vet School. Several people recommended Dr. Olby. This video does NOT include her air scratching on walks as she, of course, has not done that when I had the camera! That's our girl!
What you do see is common scratching at her ear that goes on for a while... following by a vigorous stomping and headshaking. You see a bit near the end of scratching at her tail area, but that is not as common as the other. The ear scratching is more often her right side (our left)... but on rare occasions the other side. The air scratching is more likely to be the opposite side!
So off to join the rest of you in SM world I think... do not see that likely being PSOM, but could be both. Poor thing is just 15 months. I have already cried my eyes out a few times and now doing better. Just kind of ready to get on with it. She is a tough gal too. We will both have to be I'm sure.