My mother is 70 year old. Over last 5 years we have noticed strange decline in her ability to listen to what we are saying. There is no problem with her hearing. She hears correctly but will answer to some other question which was never asked. She does that only when she makes a mistake and when defending herself, will give a different answer altogether. Also, she sleeps a lot. 4-5 hrs daily in the day. She talks a lot to herself. Keeps on repeating things at times. There are certain habits of her which we want her to change. She will listen to us and tell us she wont do it again but right after 30 minutes, she will be doing the same thing again. I do not know if this is a problem on her side or on our side in handling the situation. I need some advice on how to go about it. If we need some medical assistance, who do we approach? What kind of doctor or therapist?