1 week ago
Study Links White Matter Health to Cognitive Resilience
Scientists studied the brains and thinking skills of 459 older adults in India.
The brain has gray matter that processes information and white matter that helps brain areas communicate.
The study found that both types of brain tissue are important for thinking well.
Gray matter loss was generally linked to poorer cognitive performance.
However, healthy superficial white matter seemed to reduce some of the effects of gray matter loss.
It was especially connected with better language skills.
This suggests that strong brain connections may help some people stay cognitively healthier.
Researchers said longer-term studies are needed to test this idea.
Researchers analysed brain scans and cognitive tests from 459 Indian adults aged 60 and older.
The study found that gray and superficial white matter work together to support cognitive health.
Healthier superficial white matter was most consistently associated with stronger language abilities.
Healthy local brain connections appeared to weaken the link between gray matter loss and cognitive impairment.
Researchers said further studies must determine whether preserving white matter can help maintain cognition over time.
- Who
- Researchers, including Yingxu Liu and Leon Aksman, studied 459 community-dwelling adults aged 60 and older in India.
- What
- The study examined how gray matter and superficial white matter relate to cognitive performance.
- Where
- The research involved older adults across India and used data from the Longitudinal Aging Study in India dementia assessment.
- When
- The study was published in Alzheimer's and Dementia: The Journal of the Alzheimer's Association; no publication date is provided.
- Why
- Researchers sought to understand whether the health of white matter connections affects cognition and the impact of gray matter loss.
Key facts
- Participants
- 459 community-dwelling adults aged 60 and older
- Location
- India
- Data source
- Harmonised Diagnostic Assessment of Dementia for the Longitudinal Aging Study in India, or LASI-DAD
- Imaging method
- Advanced diffusion magnetic resonance imaging
- Cognitive areas tested
- Language, memory, executive function and visuospatial ability
- Most consistent association
- Healthier superficial white matter was linked to stronger language skills
- Key limitation
- Researchers said following participants over time is necessary to test whether preserving connections maintains cognition
Quotes
Yingxu Liu
first author, postdoctoral scholar, University of Southern California
“Gray matter and superficial white matter are physically close and may play different roles: gray matter processes information, while superficial white matter helps nearby brain regions communicate”
rediff.com
Leon Aksman
senior author, assistant professor, University of Southern California
“The findings point to superficial white matter as a possible source of resilience”
rediff.com
Sources
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