Our brains thrive on a challenge, but it doesn’t all have to be hard work to see the health benefits. Here are three simple and fun ways to protect your brain as you age.
If presented with an easy task or a hard one, which would you take? Chances are we’d all pick the easy task, for good reason. Taking mental shortcuts is built into our biology in order to conserve our energy.
Technology has only enhanced our ability to do so. It’s therefore tempting to take shortcuts and complete tasks with the least friction possible. However, if that results in reduced mental effort it could be harming our lifespan and overall health.
When it comes to the brain, there are things we can do to promote a longer healthy lifespan. Essentially, if we take part in challenging activities, we are building up what’s known as “cognitive reserve” – which has a protective effect on the brain.
We don’t need to radically overhaul our day-to-day life, but can make small, incremental changes across physical, social and mental domains to protect our brains. Here are three of the most enjoyable to start off with.
Spatial navigation
One strategy to protect against age-related cognitive decline is to target a specific part of the brain. The brain area important for spatial navigation, the hippocampus, is believed to be the first part of the brain affected in Alzheimer’s disease, several years before symptoms start to show.
“For years we’ve known that people with Alzheimer’s often get lost as an initial symptom,” says neurologist Dennis Chan from University College London, UK, who specialises in early Alzheimer’s detection. And early detection is crucial, he says. “The earlier we identify [cognitive impairments] the faster we can do something about it.”
Protecting this brain area could therefore help prevent or delay symptoms. For instance, studies show that ambulance and taxi drivers have among the lowest rates of Alzheimer’s-related mortality compared with other roles, precisely because these drivers had been using their brain more for “spatial processing”, the researchers propose. It’s also long been known that taxi drivers who had spent years learning the city’s streets without the use of a map, have an enlarged hippocampus.
Similarly, one study of healthy men who performed a spatial navigation task for four months showed improved navigational skills and no loss of hippocampal volume, whereas the control participants (those who did not perform the task) did experience expected age-related shrinkage.
Stay socially active
In line with that, numerous lines of research have shown that staying socially active protects us from cognitive decline. Centenarians with higher social engagement have better brain health, for instance, while taking part in social activities during midlife has been associated with higher overall cognitive ability in old age.
This has also been shown by a large observational study, which found that those who were more socially active in midlife and later life had a 30-50% lower risk of dementia as it increased cognitive reserve, the authors note.
Staying socially active can delay symptoms too. A study of 1,923 older participants, of those who went on to develop dementia, those who were least socially active developed it five years earlier than the most socially active.
This is thought to be because staying social helps lower stress, making us more resilient to life’s challenges. Chronic stress on the other hand, has been linked to the loss of neurons in the hippocampus. “The protective factor is the ability to discuss, to debate, to share ideas. Those conversations can be protective for the brain as well,” says Pamela Almeida-Meza, an epidemiologist at King’s College London.
Lifelong learning
One large predictor of ageing well is how many years an individual has spent in education. Those who spend more time in education show a reduced dementia risk. Learning throughout our lives can help promote the same health-protecting benefits. Our brain thrives on challenge and novelty because doing so strengthens brain areas most vulnerable to ageing. When we keep our brain active, it has been shown to slow down cognitive decline.
A key reason for this is because learning creates new neurons as well as strengthening existing ones, which can buffer against ageing and cell death. This is neuroplasticity in action, which is the brain’s ability to adapt and change throughout our lifespan.
Ultimately, what’s clear is that any activity that stimulates the brain is beneficial for overall health, whether it’s a new route on a walk, reading Proust or prioritising social relationships. All of this helps build a resilient brain and slows down age-related decline, as well as making life more enjoyable in the process.
Credit: bbc.com
