Sorry to hear about your mother, Raptor. My father had a "Transient Ischemic Attack" a couple of years ago. Those are very small strokes that are short in duration. He experiences some short term memory loss as a result of it, but he's otherwise ok, and he leads a very normal life. The only advice I can give you is to be as patient and understanding with your mother as possible, but I imagine you already know that.

Best wishes for a complete and speedy recovery for your mother.