If our brains were computers, we'd simply add a chip to upgrade our memory when we find ourselves having those frustrating moments of searching for lost car keys, wracking our brains to recall a name or coming up empty when a familiar word is on the tip of our tongues.
We may find ourselves joking about "senior moments," but realize that humor may be covering the underlying fear of Alzheimer's disease. Even though five percent of people over the age of 65 (and a much larger proportion over the age of 80) do develop Alzheimer's disease, there is evidence that memory lapses don't necessarily foretell dementia.
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