Laura Fonken, a doctoral student in the Department of Neuroscience at Ohio State University, recently conducted a mouse experiment in collaboration with the Davis Cardiopulmonary Institute. Researchers asked one group of mice to breathe polluted air - imitating human pollution; the other group to breathe filtered fresh air. Six hours a day, five days a week, for a total of 10 months, ran through most rats. The researchers then conducted a five-day experiment on all older mice and found a small hole in two minutes leading to a dark room on a very bright field. They found that mice exposed to polluted air for a long time not only needed more time to learn to dig holes, but also quickly forgot.
Anatomical results showed that there were significant differences in hippocampus between the two groups. The neurodendritic mutations in the hippocampus of contaminated mice were short, the dendritic spinous mutations were few, and the cell structure was not complex enough. Previous studies have linked these changes to the decline in learning and memory.
The Davis Institute also found that aerosols polluted by air can cause systemic inflammation, and proinflammatory cytokines are particularly active in the hippocampus, which is particularly sensitive to inflammation damage - the results are predictable. In addition, as Laura's other experiment shows, systemic inflammation is also associated with depression. The study, published in the July 2011 issue of Molecular Psychiatry, revealed for the first time the direct effects of air pollution on the brain.
In November 2012, Jennifer Osher, a sociologist at the University of Southern California, reported on a large national survey at the 65th annual meeting of the American Geriatrics Association, which concluded that fine particulate matter (PM2.5) in the air had a serious impact on the mental abilities of middle-aged and elderly people. The study found that with the increase of PM2.5 concentration per 10 micrograms per cubic meter, there was a decrease of 0.36 IQ scores - the normal average one-year time for all participants was longer, cognitive ability decreased by 0.13 points, and a decrease of 0.36 points meant three years of age. Even after controlling for race, sex, education, smoking, respiratory and cardiovascular conditions, the results were consistent.
How do we protect ourselves against air pollution
Although the complete solution of environmental problems depends on the policies and regulations of the whole society and the country, at present we take the initiative to reduce the harm of air pollution as much as possible.
1. So try to arrange outdoor activities in the morning and evening, avoid noon hours;
2. Turn on the air filter when driving. If possible, choose automobile air purifier;
3. Keep the room dry and avoid mildew, which floats in the air and is sucked into your body.
4. Avoid smoking places;
5. Open your air purifier at home or in the office.