"It was a geriatric psychologist in New York, Mitchell Slutzky, who told me about the subset of 'pleasantly demented.' Most doctors I interviewed hadn't heard the term, but when I put out the word, I received a flood of emails from friends and bloggers, saying they had relatives who were pleasantly demented.... Even if doctors hadn't heard the term, some reported seeing patients who fit the description. Dr. Oliver Sacks, a professor at Columbia who writes lyrical books about people with neurological disorders, recounted how Ralph Waldo Emerson was cheerful in his 60s when he began sinking into 'soft oblivion.'"
—Sara Davidson, "My Mother's Case of 'Pleasant Dementia,'" Newsweek, September 22, 2008