Photo of brain scan showing elevated amygdala levels in children with depression

Brain scans of preschoolers with depression revealed elevated activity in the amygdala (the small area in the red circle) when compared with scans of young children exhibiting no signs of depression. (Credit: Washington University School of Medicine)

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Brain scans of preschoolers with depression revealed elevated activity in the amygdala (the small area in the red circle) when compared with scans of young children exhibiting no signs of depression. (Credit: Washington University School of Medicine)