and kudos to this strong 92-year-old lady! the answer to your question is: it might not be a type of dementia at all. i'd suggest you have this lovely lady examined by a health care professional. several conditions could cause the symptoms you describe. one thing that comes to mind is a urinary tract infection (uti). in the elderly the symptoms of a uti can mimic those of dementia or alzheimer's disease. but uti is just among many medical possibilities for what this lady is experiencing. the only way to find out for sure is for her to get checked out by a doctor. best wishes to you both!
if 92 year old gets monthly dementia for a few days to a week then total exhaustion for a day then coherent why? . each month fro almost a year 92 year old female gets dementia(see's people from her past prays sees random children and strangers animals) for about a week then has a day of total exhaustion barely enough energy to eat sleeps most of the day. after that she is back to clear-mindedness. she is insulin-dependent in wheel chair on low dose of morphine for back pain chronic constipation. just would like to understand what type of dementia this is.