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The study published in JAMA Neurology reveals an intriguing trend - the size of the human brain is increasing, particularly in younger generations like Generation X. Analyzing images of over 3,000 participants aged 55 to 65, researchers at UC Davis Health found that those born in the 1970s have a larger overall brain volume compared to those born in the 1930s.
Specifically, Generation X has a 6.6% greater brain volume, with 8% more white matter and 15% more gray matter. The hippocampus, crucial for memory and learning, also showed a 5.7% increase in volume.
Lead researcher Charles DeCarli noted that birth decade seems to impact brain size and potentially long-term brain health. While genetics play a role, external factors like health, culture, and education may also influence brain development.
This larger brain size could provide a buffer against age-related diseases like dementia, potentially reducing overall risk. This positive trend aligns with recent data showing a decrease in dementia incidence across decades, particularly in younger generations due to healthier lifestyles and upbringing.
(Image Credit: Internet)