Can Deterioration Of Blood Cells In Brain Cause Memory Loss?

Dear Sir,
One of my cousin's mother got hospitalised after she fell unconscious on the floor at home. After checking the scan report of the brain, the doctor said her brain cells getting deteriorated and no hope at all. She is 65-70 yrs old and cann't memmorize or identifying anyone even her children or close relatives. She is under physio therapy now and found condition is improving.
>However, upon these situations we are little bit worrying about her health condition.
Please advise what we need to be done and what treatment should be given her. Your valuable advice is may cool our mind.

Your faithfully
Anwar
Doha