Mother, 99, advanced dementia behavior (no concept of date, time, travels in time, asks for parents, paranoia, combative, confabulation, no short term memory, very little long term, repeats herself, inability to read or write, incontinent) although it's an informal Dr diagnosis as she believes she's of sound mind and fought an MRI and I, POA, see little benefit in forcing one.
Formerly physically active and coordinated, angered while in hospital and lashed out, refused to ever move a muscle again. No medical issues found (checked for stroke, etc.). Stopped moving, had to be diapered, repositioned, IV fluids, spoon-fed, bed baths. Thought to be a behavioral choice.
2 years later: Raging again. Violent. Now feeding herself, drinking from a cup, using a shower chair (with asst), articulate as ever. But her brain is still broken. Refuses to cooperate. Only on her own terms.
We and the staff are dumbfounded. Months - too long for terminal/paradoxical lucidity.
I'm asking strictly out of curiosity.
I wonder if something similar could be going on with your mom. When someone has so many things affecting behavior, it’s close to impossible to sort them all out so all can be addressed.
She's still antisocial, getting meaner. But physical abilities resurfacing 2 years later at age 99 blew my mind.
Incidentally, she is as articulate as ever. Still showtiming. Unless she tells you she's 19 and late for class, demanding to know why her parents haven't picked her up yet, you might not know she has dementia.
Edit: The only things she NEVER forgets is why she's angry. Ha ha!