Stress directly effects your hippocampus and shrivels it. It's your center for memory. So you'd have trouble following a sentence or recalling stuff even if it happened 2 minutes ago. For some reason, when I told my doctors that my father had been livingin a psychosis for over a decade she mentioned dementia. I think the causes of what I was encountering and what people with dementia have are two separate causes. However, the effects can look the same after a long time under psychosis. This is why medicine is so very important. You're brain heals but do you want to take a chance and let it decline again only to have it not repair as well as it once did? Medicine comes with a price, but if your memory is starting to fail you then you might want to try a med to relieve your hippocampus from unwanted stress.