My husband is 54. He is healthy and happy. Over the last six years, I've seen some odd behavior including lack of motivation, and forgetfulness. Sometimes he acts bizarre and says odd things. Sometimes he does childlike things. He doesn't always make what I would determine the right or best decision. And when I call him out on things, he doesn't seem to be bothered by what I say or even knows he did anything different. At this time, his symptoms are intermittent, however I am beginning to see more and more symptoms that concern me. He was previously diagnosed with Manic episodes, which seemed accurate at the time, however the episodes are becoming more frequent, and he doesn't seem to be in a manic state. I am in the process of scheduling a CT scan with a neurologist to hopefully rule-out this diagnosis. For those whose spouses suffer from this form of dementia, how long did it take for symptoms to become regular - years? I am feeling lost and guilty for even considering that this could likely be happening to my husband.