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Neighborhood Parks Could Help Your Aging Brain
  • Posted October 26, 2023

Neighborhood Parks Could Help Your Aging Brain

A variety of risks can make it more likely that someone develops Alzheimer's disease or other dementias.

Now you can add neighborhood environment to that list. A new study finds low income levels and a lack of green spaces are among the factors that can harm brain health.

"Social determinants of health have a major impact on cognition, as well as cardiovascular and cerebrovascular health,"said lead author Lilah Besser. She's a research assistant professor of neurology at the University of Miami Miller School of Medicine's Comprehensive Center for Brain Health.

"Understanding these interactions is crucial in developing interventions to improve brain health in individuals living in disadvantaged neighborhoods,"Besser explained in a university news release.

Past research has shown that a type of brain damage known as white matter hyperintensities has been linked to higher risks of Alzheimer's disease and dementias, as well as stroke.

Other studies have found an increased risk of dementia in lower socioeconomic neighborhoods.

This study built on that, using MRIs of 1,260 people. The participants were cognitively normal and age 65 or older. Scans were taken approximately five years apart.

The researchers measured changes in white matter hyperintensities and brain ventricle size. They also assessed associations between neighborhood green space, neighborhood income and the MRI scans.

"We found that white matter worsening was more likely for individuals in lower green space/lower income neighborhoods than higher green space/higher income neighborhoods,"Besser said. "This combination may be a risk factor for brain health, but further research is needed."

The findings were published online Oct. 25 in the journal Alzheimer's & Dementia: Diagnosis, Assessment & Disease Monitoring.

Neighborhoods become increasingly important as people retire, drive less and have medical issues, Besser noted.

"Green spaces can provide quiet moments for older adults to refresh their brains, reduce chronic stress and increase physical activity,"she said. "It is one of the social determinants of health that can be modified by policy interventions, such as creating more parks and planting more trees."

More information

The U.S. Centers for Disease Control and Prevention has more on Alzheimer's disease.

SOURCE: University of Miami Miller School of Medicine, news release, Oct. 25, 2023

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