I have had an issue recently with Gran being extremely confused and disoriented after any amount of sleep. She is normally quite lost as it is, but it has been particularly bad in the last week or so.
Yesterday evening, she fell asleep while watching TV in her room. She couldn't have been asleep for more than 30 minutes or so, but when she woke back up around 8:30 pm, she was fully convinced it was the start of a new day. It took me a long time to talk her out of restyling her hair and putting on some new clothes!
Whether or not it is light or dark outside doesn't seem to be any kind of clue to her anymore. She wakes a lot during the night and I can hear her banging around in her room. Sometimes I can hear her doing 'new day' things (setting her hair, rummaging for jewelry, etc.). I am afraid that she will keep lapsing and end up at a point where she's trying to start the day in the very wee hours of the morning or the middle of the night.
Anyone have any experience with this, or any advice? Is it normal progression of the disease, or is there a chance there might be an outside cause? Right now, all I can think to do is try and prevent her from falling asleep in the middle of the day, but she falls asleep so fast (and sometimes so briefly) that it means checking on her every 15 minutes or so. She likes her privacy and doesn't enjoy me inviting myself into her room.
I got a clock that projects the time (along with am or pm) on the ceiling. That went a long way toward helping my demented mom to figure out whether to start the day when she woke up in the middle of the night. She could see this without putting her glasses on or turning on lights.
If her sleep patterns get way off, discuss it with her doctor.
Good luck with your dear Gran.