Microplastics can move through mice brains and block blood vessels, essentially mimicking blood clots that could potentially be fatal or otherwise disrupt brain function. From a report: The findings are detailed in a peer-reviewed paper for which researchers for the first time used real-time imaging to track bits of plastic as they moved through and accumulated in brain blood vessels. When one piece of plastic got stuck, others accumulated behind it, like a "car crash," the authors reported.

The authors then found decreased motor function in those mice exposed to microplastics, suggesting impacts on the brain. While mounting evidence has linked microplastics to neurotoxicity, the research is the first to suggest how -- it probably reduces blood flow. "This revelation offers a lens through which to comprehend the toxicological implications of microplastics that invade the bloodstream," the Peking University authors wrote.

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