This article or section may be confusing or unclear for some readers, and should be edited to rectify this. Please improve the article, or discuss the issue on the talk page. PET scans measure the activity of various parts of the brain. The image on the left illustrates areas of activity in the brain of a person without ADHD while doing an assigned task. The image on the right illustrates the areas of activity of the brain of someone with ADHD when given that same task. There is some contr ...
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