Hi Danknight
Sorry to hear your girlfriend's mum is showing signs which might indicate the start of AD. The following round stuff - yes, this can be how it starts, a sort of separation anxiety like toddlers who follow mum around. But for them you can use stairgates etc but not for the elderly. Well you could I suppose, but don't think it would be advisable as it would look like you are infantilising her.
My mum, in the early stages, would follow my dad everywhere - down the garden, upstairs, into the kitchen (which was hazardous as their kitchen is very tiny). Has your girlfriend's mum been given a diagnosis of Alzheimers yet? If not, try to get one asap as we delayed it for 3 years, mainly because the GP kept putting it down to 'old age' by which time mum was too far gone for Aricept and even if she hadn't been, I understand Aricept is not very effective unless it can be given at the full dose of 23mg but the person has to be over 120lbs for that. My mum, bless her, is all of about 95lbs soaking wet! So for her it was 10mg - pretty useless really and now she's off it.
Do please try to get the lady diagnosed soon. There are drugs, including Aricept, which can delay/slow down the development of this awful disease.
LG x