The effects surpass the impact of a decade of aging
The brain area responsible for storing general world knowledge
Air pollution has been associated with lung disease, heart issues, and early mortality. Recently, researchers have uncovered additional evidence suggesting that the air we breathe may also influence brain function as we age. A study by UC Davis Health and Kaiser Permanente reveals that prolonged exposure to fine particulate matter might harm a crucial memory type utilized daily.
The research centered on particles called PM2.5. These are incredibly small, approximately 30 times thinner than a human hair, capable of deeply penetrating the lungs and entering the bloodstream. While the impacts of PM2.5 on physical health have been studied extensively, its effects on mental faculties are gaining increased attention.
The study discovered that individuals residing in areas with elevated PM2.5 levels over extended periods scored lower on semantic memory tests. Semantic memory involves storing general world knowledge, including facts, vocabulary, word meanings, object names, and information gathered over a lifetime. It is essential for communication, comprehending conversations, and managing daily tasks. Findings were published in the journal Alzheimer’s & Dementia: Behavior & Socioeconomics of Aging.
Researchers evaluated data from 740 participants aged between 53 and 94, calculating their PM2.5 exposure by examining air pollution levels at their residences over five, ten, and seventeen years. They then correlated pollution exposure with cognitive test scores.
The data revealed a distinct pattern. Participants subjected to higher PM2.5 levels over many years performed worse on semantic memory tests. This relationship persisted even after adjusting for factors like age, education, income, and marital status. Notably, the study found that the effect of long-term exposure to PM2.5 on semantic memory exceeded the typical impact of ten years of aging.
Illustrative photo: pexels-shvets-production-7545335
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