Hello, I don't know how to address this, since this is the very first time I have been into any websites. My father was diagnosed with alzhemer a few years ago, its been 4 months he does not recognizes me or my mother (yet some days he remembers our name). I was wondering if anyone can let me know how is it possible that this man ( 85yrs old) is os very weak and yet from 1oa.m. till 4:45a.m. has a strenght of a 25yrs old and the agility to up and down like a young man? As anyone out there can explain it to me. / I am an only child and taking care of both my parents at home. Thank you