A neurosurgeon is not usually very good with symptoms that do not require surgery. Good you don't need surgery. I would not trust this surgeon.

When you have these collapse episodes, have you tried to be examined at the E&A or whatever you Brits call it while you still can't speak? It might be best to be seen while you are symptomatic. Write a note for your wallet about this situation and figure a way to communicate that you need an ambulance to get to the E&A.

I had my second collapse on Sunday morning after one last spring. I was walking out of the bedroom and went down and hit the back of my head into a hollow core door. My wife found me on the floor in a fetal position.

Not knowing the cause can be troubling.