Before literally embracing "children are responsible to look after their parents" and opting to look after a parent/s, read about Andrea Gillies' experience (Download Nancy's jelly looking glass). Sometimes it is far better leaving the care of an aged parent up to professionals. Determined to do the right thing by taking care of her mother-in-law, they possibly did the worse. Kind-hearted optimism turned into desperation about not able to cope and very likely depression for the carer.
Alzheimer memory loss prevents the individual from making new memories—a process of transition from normal life to another world, the dementia reality of oblivion.