Now Reading: Healthy white matter wiring offsets cognitive decline in elderly Indians
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Healthy white matter wiring offsets cognitive decline in elderly Indians
Healthy white matter wiring offsets cognitive decline in elderly Indians
A study on 459 older adults across India has found that the health of the brain's superficial white matter helps maintain cognitive function even when gray matter is lost. The research used…
A study on 459 older adults across India has found that the health of the brain's superficial white matter helps maintain cognitive function even when gray matter is lost. The research used advanced MRI to examine neurite density and free water levels, linking healthier white matter to stronger language skills in frontotemporal brain regions.
The relationship between gray matter loss and cognitive decline was weaker in participants with healthier superficial white matter, suggesting this wiring may act as a buffer. Published in Alzheimer's and Dementia, the study is among the first from a low- and middle-income country to examine this brain region in a community-based population.
Researchers caution that gray matter loss remains the strongest predictor of cognition, but add that preserving local connections could soften its impact. Lead author Leon Aksman said following participants over time will test whether maintaining these connections can help sustain cognition.
Indian Opinion Analysis
The link between white matter integrity and cognitive resilience is still debated in the neuroscience community. India's LASI-DAD dataset is unique because it collects detailed brain imaging from a cohort with diverse socioeconomic and health backgrounds, unlike most studies that rely on homogeneous Western populations. If follow-up data confirm that preserving superficial white matter slows cognitive decline, it would shift resources toward early interventions that maintain myelin, like controlling blood pressure or diet, rather than just scanning for gray matter shrinkage. The next step is a longitudinal analysis of the same 459 participants, expected within two years, which could show whether better white matter health actually delays dementia onset in real-world terms.
Source: rediff.com
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