I am not sure what causes it. I think it has to do with blood flow. There are two arteries in the neck that provide some of the blood to the brain. The vertebral arteries are in a position where they could be impacted by inflammation in the neck.

For me, this tingling tends to correlate to my neck being out of a straight position, like sleeping or napping with my not supported in a straight position. I don't get this sensation very often any more. I have had lots of work done on my neck by a chiro and PT.

When I mention this to doctors, they don't seem interested in it as a useful symptom for a diagnosis.

But then, what do they know about concussion? As I noted before, the song says,,, The head bone is connected to the neck bone, but maybe the doctors never learned this song in med school. LOL with angst.

My best to you.