Study: Men's Brains Age Faster, but Women Are More Likely to Suffer from Alzheimer's Disease 0 11

A large international study has shown that men's brains shrink faster with age than women's, but this does not explain why women are more often affected by Alzheimer's disease. Researchers view this as a sign that the causes of dementia are more complex than simply brain wear and tear, reports Entrevue.

Cognitive decline is more pronounced in men

Published in the Proceedings of the National Academy of Sciences, this study is based on over 12,500 MRI scans conducted on 4,726 elderly volunteers without cognitive impairments. Each participant underwent at least two scans with a three-year interval. The scientists measured the reduction in brain volume in several key regions, including those associated with memory and sensory perception.

The results are clear: the male brain loses more volume in a greater number of areas. The postcentral cortex, involved in tactile and pain perception, shrinks on average by 2% per year in men compared to 1.2% in women.

The study also confirms that gray matter and certain structures, such as the hippocampus, which is essential for memory, shrink faster in men. This data supports the idea that brain aging occurs more rapidly in men, which aligns with their generally shorter life expectancy. However, women still have nearly double the risk of developing Alzheimer's disease.

This paradox suggests that other factors—hormonal, genetic, or environmental—play a role in women's vulnerability to the disease. Prolonged aging, differences in immune response, or the influence of sex hormones after menopause may contribute to this imbalance.

Above all, this study helps us better understand normal brain aging, which is a prerequisite for distinguishing pathological processes. It suggests that future research should explore the roles of longevity, stress, nutrition, and social factors in the development of neurodegenerative diseases in more detail.

It is evident that the male brain appears to age faster, but the female brain ages differently. Understanding this nuance may be key to more effective Alzheimer's disease prevention—an illness whose causes extend far beyond the simple issue of the passage of time.

Scientists conclude that the development of dementia cannot be explained solely by the speed of brain aging. It is likely that combinations of hormonal, genetic, and external factors influence the risk of Alzheimer's disease, which requires further study to develop more precise prevention methods.