Lifespan Mental Activity and Hippocampal Atrophy
Author Information
Author(s): Michael J. Valenzuela, Perminder Sachdev, Wei Wen, Xiaohua Chen, Henry Brodaty
Primary Institution: University of New South Wales, Sydney, Australia
Hypothesis
Does individual differences in lifespan complex mental activity link to altered rates of hippocampal atrophy independent of global measures of neurodegeneration?
Conclusion
Higher levels of complex mental activity across the lifespan are associated with a reduced rate of hippocampal atrophy.
Supporting Evidence
- Higher LEQ scores were correlated with hippocampal volume at the three year follow-up.
- Individuals with higher LEQ scores experienced less hippocampal atrophy over the follow-up period.
- High LEQ individuals had less than half the hippocampal volume decline compared to low LEQ individuals.
Takeaway
Doing lots of thinking and learning throughout your life can help keep your brain healthy as you get older.
Methodology
The study involved 37 healthy older individuals who completed the Lifetime of Experiences Questionnaire and underwent MRI scans at baseline and three years later.
Limitations
The study had a level of attrition in the original sample, particularly in individuals consenting to repeat MRI.
Participant Demographics
Healthy older individuals aged over 60 years, with a mean age of 70.3 years.
Statistical Information
P-Value
p=0.012
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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