Well, I saw the neurologist. She reckons it is a form of epilepsy that only affects a region of the left hemisphere of what passes for my brain. The affected area is involved with control of my right side limbs and enough of my tongue to make speech impossible. However, unlike "normal" epilepsy, I remain completely aware of my surroundings, and after 10 minutes or so, the seizure passes, leaving no physical damage.
The really good news is that there is a pill to control it, to be taken morning and evening. What with my twice-a-day blood pressure pills, my statin pill and my aspirin pill to combat the cancer in my immune system I could probably open my own pharmacy.
My daughter suggests I hire myself out to bands, where I could jump up and down, instead of them having a maracas player!