Hi, My aunt is going through some serious changes in her personality. She was a very capable independent women but for the last few years her behaviour and mental and emotional health has declined considerably. She is always confused, she can't concentrate, she always mumbles and speak totally out of context. She can't follow instructions properly for eg if we ask her for a glass of water she will walk back and forth kitchen and sometimes if we have to remind her again. Her husband is Physically challenged so she was taking care of him. Now She  is behaving aggressively to him also. She have severe mood swings. It's like she is a whole different person now she is apathetic . It's like is mentally retarded (sorry to use the word ) We are very confused which doctor to consult ? Is this dementia? But her memory seems ok. But I think she have issues with prossessing information. Please advise.