How can tell you are suffering from old timers disease, senility, or hardening of the arteries?

They are different. The first symptoms of alzheimer's disease you may notice are increasing forgetfulness and mild confusion. Over time, the disease has a growing impact on your memory, your ability to speak and write coherently, and your judgment and problem solving. Dementia is a serious loss of global cognitive ability in a previously unimpaired person, beyond what might be expected from normal aging.