Brain health is shaped throughout life by factors such as education, cardiovascular health, social connections, and living conditions. [ File, Standard]
Age tells us how long we have lived but surprisingly little about how well our brains are ageing. Research is revealing remarkable differences between people of the same age, with some maintaining strong cognitive function well into later life. Explaining those differences may be one of the most important questions in brain health today.
The idea that helps explain these differences is brain resilience. It describes the brain's ability to continue functioning well even as it faces the challenges that come with age, illness, or adversity. Rather than focusing only on what changes in the brain over time, resilience asks a different question. Why do some people continue to thrive despite those changes?
One of the biggest misconceptions is that brain health becomes relevant only in old age. By then, much of the story has already been written. The foundations are laid across a lifetime, shaped by health, education, living conditions and access to care. That is why the World Health Organisation defines brain health across the life course, not simply in later years.
