The most common cause of brain injury in premature infants is a lack of oxygen in the days and weeks after birth, researchers say. Ibrahim Usta/AP hide caption

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Ibrahim Usta/AP

Why Brain Injuries Are More Common In Preemies

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Karen Butler could get her American accent back with intensive speech therapy, but she likes her new one. Jane Greenhalgh/NPR hide caption

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Jane Greenhalgh/NPR

A Curious Case Of Foreign Accent Syndrome

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