In days gone by, mental ‘disturbances' were considered something you should ‘snap out of' - a mere emotional phase that you should grow out of, like adolescence. Decades later and mental illness is an actual, recorded disease, warranting much-needed medical intervention. Well, yes, but how do we know we actually have it - especially in those crucial, early stages?
Early diagnosis of Alzheimer's would be critical in order to stop and reverse cell death before it is too late. As we all know, once brains cells are dead there is no way to revive them. But, if you catch Alzheimer's Disease early enough you could slow it down and even reinvigorate the cells.
What we have always needed is a ‘Dr. Bones'-type machine from Star Trek that doctors can run down our apparently healthy bodies to pick up those tell-tale early signs.