The greater your cognitive reserve, the more resilient your brain will be. Brain reserve—or cognitive reserve*—helps your brain adapt and respond to changes and resist damage. It gives it the ability to improvise and find alternate ways of doing a job or performing a task.
Your cognitive reserve begins to develop in childhood and gets stronger as you move through adulthood. If you continue to learn, embrace new activities, and develop new skills and interests, you will continually build and maintain your cognitive reserve.
This is another reason to aim for challenging yourself rather than taking it easy and following the path of least resistance. You don’t know when you’re going to need your cognitive reserve, so it’s good to have as much of it as possible “in the tank.”
Protection from Damage
The concept originated in the 1980s. Researchers discovered that some people who were found at autopsy to have brain changes consistent with advanced Alzheimer’s disease had displayed no apparent symptoms of dementia before they died. These individuals had enough cognitive reserve to offset the damage to their brains to allow them to continue functioning as they always had.
Cognitive reserve can also help stave off degenerative changes associated with other brain diseases, such as Parkinson’s disease, multiple sclerosis, or a stroke.
Even if you’re fortunate enough to never experience any of these diseases, you can still benefit from developing cognitive reserve. It can help you function better—and for longer—when you experience unexpected and stressful life events, which tend to require more effort from your brain.
You can’t prevent yourself from aging or insulate yourself from all stressful, unexpected, or life-altering events. You don’t have total control over what kinds of diseases or deficits your genes might predispose you to develop. But you can do something to moderate how much these challenges affect you, your well being, and your ability to function.
Learning, Curiosity, and Dopamine
Even if you don’t develop neurological or psychological disorders, brain circuits that rely on dopamine tend to decline in function with aging. But curiosity prepares your brain for learning by activating the reward system, enhancing memory and motivation in the process. When you’re learning something you’re deeply—as opposed to idly—curious about, you’re more likely to recall and retain what you learn about that topic. You’re also more likely to retain unrelated information you encounter at the same time.
Curiosity may put the brain in a state that allows it to learn and retain any kind of information, like a vortex that sucks in what you are motivated to learn, and also everything around it. —Matthias Gruber, UC Davis Center for Neuroscience
Curiosity, challenge, and complexity seem to define the path that leads to strong cognitive functioning and a more active and enjoyable life now—and to greater cognitive reserve whenever you may need it.
Have your education, work, and leisure activities challenged you over the years? If so, they have contributed to your cognitive reserve. If not, there’s no time like now to reverse course if you want to do as much as you can to maintain your memory and your cognitive skills for as long as you can. Engaging in a variety of activities—physical, mental, and social—with differing levels of complexity have a synergistic effect. So the more things you do in these areas, the better—for both you and your brain.
*“Brain reserve” is sometimes used to refer to physical changes in the brain such as an increase in neurons and synapses (aka the “hardware”). “Cognitive reserve” is sometimes used to refer to the brain’s capabilities and skills in regard to completing tasks, learning new things, or recall (aka the “software”). These distinctions are really two sides of the same coin, and research is currently being conducted on the relationship between them.