Brain scans identify a severe ADHD subtype defined by emotional dysregulation
A JAMA Psychiatry study of 1,154 brain scans finds three ADHD biotypes—predominantly inattentive, predominantly hyperactive/impulsive, and a severe, emotionally dysregulated subtype with widespread brain changes—pushing for biologically grounded ADHD definitions beyond current symptom criteria. While promising for targeted diagnosis and treatment, brain imaging remains impractical for routine clinical use, and clinicians note variable treatment responses, underscoring the need for tailored approaches.