The study, published in Biological Psychiatry: Cognitive Neuroscience and Neuroimaging, has the potential to radically reframe how researchers think about ADHD. “This study found evidence that clearly supports the idea that ADHD-diagnosed adolescents are not all the same neurobiologically,” said first author Dr. Michael Stevens, of the Olin Neuropsychiatry Research Center, Hartford, CT, and Yale University. Rather than a single disorder with small variations, the findings suggest that the diagnosis instead encompasses a “constellation” of different types of ADHD in which the brain functions in completely different ways.

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