Using fMRI are there neuronal functional differences between subjects with and without ADHD?
Alt 1: No, children use the same parts of their brain for cognitive functioning regardless of whether they have ADHD or not.
In analysis could treat two groups as one
Alt 2: Yes, normal subjects would rely mostly on the caudate and globus pallidus, while ADHD subjects would have more activity in their cortex.

Jessica Hartstein