When I was facing that brain surgery in Feb. for removal of a tumor and a bit of my left hippocampus I did a lot of searching and reading about the hippocampus. I sure wish I had saved it for now.

I learned ( if I'm rembering it correctly ) that the hippocampus is responsible for changing short term memory into long term and it's damaged by seizures. The hippocampus is damaged by seizures -- it can be destroyed by severe, long term sz -- and therefore the memory is damaged by sz.