ADHD Is Not One Thing: Brain Scans Reveal Three Distinct Profiles

A multinational MRI study of about 1,800 children reveals ADHD can be divided into three brain-based biotypes with distinct neural fingerprints, including a hidden severe type marked by widespread changes in emotion-regulation regions and neurochemical signatures. The findings suggest ADHD treatment may need to target emotion regulation and biology beyond dopamine-focused stimulants; however, MRI cannot diagnose individuals yet. Over four years, most groups improved in attention, but the severe biotype often maintained emotional difficulties and higher risk for mood disorders. The study was replicated in a separate cohort, bolstering the case for biological subtypes guiding future diagnosis and personalized care.