My husband is 63. He had a stroke at age 39 (no cause found) which caused personality changes. Of course, it has been many years - but now there seems to bre a new, progressive problem. He is having short-term memory loss, mood changes, poor judgment, and is talking through clenched teeth. He sometimes just stares at me when I m talking to him as if he is trying to process what I am saying. I m wondering about Alzheimer s or other dementia.