Scientists identify several different ways that ADHD can manifest in people, along with three different brain profiles - Earth.com
"One biological subtype – what researchers call a biotype – caught the team off guard. It looked like combined-type ADHD on the surface, but the scans told a different story.
Where the other two groups showed deviations in 26 and 11 brain regions, this one showed differences in 45. This was far more than expected.
Disruptions clustered in the medial prefrontal cortex and the pallidum, a structure deep in the brain that is thought to be involved in motivation and impulse control. These regions are also associated with regulating emotional reactions.
Children in this group did not just have trouble sitting still. They cycled into intense emotional outbursts – frustration that wouldn’t ease, anger that landed hard.
Some clinicians have informally called this pattern the emotional dysregulation version of ADHD. A previous review flagged it as common but poorly recognized. Until this study, it had no clear neurological home."