ADHD’s Brain Signature Shifts as Children Become Teenagers

Attention-deficit/hyperactivity disorder (ADHD) is a persistent neurodevelopmental condition, but how its signature appears in the brain may change significantly between childhood and the teenage years. A new large-scale meta-analysis, combining data from 28 separate studies, has shed light on these developmental differences.

Researchers analysed resting-state fMRI scans—which measure the brain’s baseline activity when not focused on a task—from nearly 2,000 children and adolescents. The results showed a distinct split. Children with ADHD consistently displayed decreased spontaneous neural activity in several frontal lobe regions, areas crucial for planning and focus.

In adolescents, however, the picture was more complex. They showed a mixed pattern of increased activity in some brain regions and decreased activity in others, including the cerebellum. This suggests that the underlying neural mechanisms of ADHD are not static but change with development, a crucial insight for future age-specific research and understanding of the disorder’s progression.