I am wondering if this is a hallmark of dementia? My mother, who is 80 with advancing dementia, has become terribly abusive, both verbally and emotionally, toward my father. He's constantly walking on eggshells around her, hoping to keep her from going on one of her 'rampages'. But she goes off on him several times a week now, almost daily, saying the most terrible things to him, going into emotional rages. Is this something related to dementia? Her outbursts are so extreme and inappropriate I'm starting to wonder if she's just plain going crazy?