By Sandee LaMotte, CNN

Despite volunteering and working out at the gym several days each week, socializing frequently with friends and family, reading all manner of books and doing daily crossword puzzles, 85-year-old Carol Siegler is restless.

“I’m bored. I feel like a Corvette being used as a grocery cart,” said Siegler, who lives in the Chicago suburb of Palatine.

Siegler is a cognitive “SuperAger,” possessing a brain as sharp as people 20 to 30 years younger. She is part of an elite group enrolled in the Northwestern SuperAging Research Program, which has been studying the elderly with superior memories for 14 years. The program is part of the Mesulam Center for Cognitive Neurology and Alzheimer’s Disease at Northwestern University Feinberg School of Medicine in Chicago.

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