What neurological abnormalities have been observed in acute paraquat poisoning survivors using susceptibility weighted imaging (SWI)?
Answer
Excessive iron deposition and microstructural damage
Imaging studies, specifically those using susceptibility weighted imaging (SWI), have been used to analyze the brains of individuals who survived acute poisoning. These scans reveal long-term changes within the extrapyramidal ganglia, a region of the basal ganglia essential for motor control. The findings consistently show excessive iron deposition and persistent microstructural damage, indicating that the toxic effects on the brain extend well beyond the immediate crisis and may contribute to chronic neurological dysfunction.
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