
27/08/2025
NEIGHBOURHOODS MAY HOLD THE KEY
TO SLOWING COGNITIVE DECLINE
A 13-year study of older Australians has revealed that where you live may play a powerful role in how your brain ages.
A collaboration between researchers from the Centre for Healthy Brain Ageing (CHeBA) at UNSW Sydney and the Australian Catholic University (ACU) has found that living in walkable, green, and well-connected neighbourhoods - especially those with access to public transport, commercial services, and blue or green spaces - may help protect against memory and cognitive decline.
The findings, published in Alzheimer’s and Dementia, come from the Sydney Memory and Ageing Study (MAS), one of Australia’s largest and longest-running studies of ageing and brain health. Over 1,000 adults aged 70 and older were followed for nearly 14 years to investigate the factors that predict cognitive stability, decline, and even improvement.
Participants living in more densely populated, greener areas with better access to services were less likely to develop dementia. Conversely, those exposed to higher levels of air pollution - particularly fine particulate matter (PM2.5) - were more likely to experience cognitive decline.
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