Hi Andy,
Have you recently had a relapse, that you know of?
It could be an after-effect of that.
I had it once - very embarrassingly - at Birmingham New Street Station. I was going to a meeting in Solihull (think this was before I was diagnosed, or I probably wouldn’t have been stupid enough to go).
I had to change trains at New Street. My incoming train was late, so when I arrived at New Street, my connection was already up on the departure board, flashing as “boarding”. It was the furthest possible platform from the one I’d arrived on, and up a flight of stairs too. I knew I had to run - which seemed fine…at first.
I then got halfway up the flight of stairs, lost all power, and couldn’t go up OR down, just like you (and the Grand Ol’ Duke of York).
I had to just stand there, clinging to the handrail, as the rush-hour crowds surged past me, and I missed my train. After a while - may not have been as long as two minutes - I felt confident enough to slowly make my way back down again.
I don’t know the detailed scientific explanation, but I know I had not long had a relapse, from which I was not properly recovered, so I think of it just like a bit of a loose connection.
I’m still walking (up to three or four miles) over two years later, so don’t read it as a sign that the paralysis is about to become permanent. I think it’s just a case of the circuits being temporarily overloaded - perhaps because you’ve put too much demand on them suddenly. If it happened again, I know the secret is to stay calm, and wait for it to pass. But it hasn’t happened in a long time, now I’m properly over the relapse. I think it was a legacy of that.
Tina