The third disease comes early. Frontotemporal dementia typically strikes younger people (around age sixty, though it can even hit twenty-year-olds). Language deficits are a symptom, but the biggie is a striking change in personality. You see wildly inappropriate behavior, such as shouting at strangers, hitting people, gorging on food, and exhibiting a marked indifference to loved ones. Frontotemporal dementia also can include repetitive behaviors, such as talking about the same subject over and over again, continually mowing the lawn, or walking the same path repetitively. It is
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