Researchers using PET have discovered that welders exposed to manganese fumes at work have fluorine-18 dihydroxyphenylalanine uptake in areas of the basal ganglia, which plays a role in cognition, memory and movement, and in Parkinson's disease. The reduced uptake could indicate initial signs of manganese neurotoxicity, which carries the risk of brain injury and loss of motor skills, according to the study published in Neurology.

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