At middle age, the brain begins to draw on more of its capacity for improved judgment and decision making.
If you forget a name or two, take longer to finish the crossword, or find it hard to manage two tasks at once, you’re not on the road to dementia. What you’re experiencing is your brain changing the way it works as you get older. And in many ways it’s actually working better. Studies have shown that older people have better judgment, are better at making rational decisions, and are better able to screen out negativity than their juniors are.
Although it may take you a little longer to get to the solution, you’re probably better at inductive and spatial reasoning at middle age than you were in your youth.
The older brain at work
How is it possible for older people to function better even as their brains slow? “The brain begins to compensate by using more of itself,” explains Dr. Bruce Yankner, professor of genetics and co-director of the Paul F. Glenn Laboratories for the Biological Mechanisms of Aging at Harvard Medical School. He notes that MRIs taken of a teenager working through a problem show a lot of activity on one side of the prefrontal cortex, the region we use for conscious reasoning. In middle age, the other side of the brain begins to pitch in a little. In seniors, both sides of the brain share the task equally.
The cooperative effort has a payoff. “Several studies suggest that seniors who can activate both sides of the brain actually do better on tasks, while those who can’t do worse,” Dr. Yankner says.