Could Air Pollution Be Damaging Your Brain?

Previous studies have shown the dangers of air pollution. Particularly in urban environments, some studies have suggested that exposure can increase the risk of autism for the unborn child of a pregnant woman living in the area. And let's not forget about respiratory issues we well.

New findings published in the American Heart Association journal Stroke reveal that long-term exposure to air pollution increases the risk of silent stroke by 46 percent, can disrupt the size of the brain and it's structure by 0.32 percent and may also result in reduced cognition.

Researchers used MRI scans on 943 participants who were in top shape to find out just how long-term exposure to air pollution can negatively impact the brain and even increase the risk of future stroke, as well.

The researchers used magnetic resonance imaging (MRI) on 60 years and above study subjects that are based in New England and then compared their brain size and structure. Furthermore, they also compared pollution levels at the place where the study subjects resided.

Findings revealed that brain volume decreased at an age of 0.32 percent when the rate of higher pollution of fine-particulate was at 2 micrograms, which could potentially be coming from car exhaust and other vehicle-related pollution that are sources of fine-particle pollution.

The risk of silent cerebral infarction (SCI) was also higher when exposed to highly polluted areas. Researchers found that at an increase in pollution of 2 micrograms, there was a significant increase of SCI or "silent stroke" by more than 46 percent.
Researchers are still studying to find out just why pollution results in brain changes via volume and structure. However, they believe higher levels of pollution over exposed periods may have something to do with inflammation in the brain. However,more studies will be needed in order to confirm a connection.