She has begun to have negative rude outbursts in the dining room and then has no memory of incident at all, denies it happened, and accuses staff of lying! She has never been social, rude, cold, judgemental, but can charm when necessary. Neurological exam indicated only slight age related dementia so not cause of outbursts! I am at my wits end. I am called weekly and have asked that she be served in her room! Any help will be welcomed!!