I'm hardly an expert, but I think it's wrong to assume that this is automatically Alzheimer's or dementia. You know, as we get older our memories sometimes start to fail us. And our hearing, too. Could it be Alzheimer's? Sure, it's possible. But you knew that before you posted this. But isn't it just as likely that she's just getting older? Holy cow, there's plenty of 77-year-old who don't hear so well and who sometimes forget things but who *don't* have Alzheimer's. Hell, there's plenty of people half that age who you could say that about. All I'm saying is, don't panic and leap to assumptions. See if you can talk to your doctor or some other professional about your concerns. But don't assume the worst.