Glucose metabolism, both global and regional, was reduced in adults who had been hyperactive since childhood. The largest reductions were in the premotor cortex and the superior prefrontal cortex--areas earlier shown to be involved in the control of attention and motor activity.

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Global or absolute measures of metabolism using positron emission tomography and fludeoxyglucose F18 did not statistically differentiate between normal adolescents with ADHD. Positron emission tomography scans can be performed and are well tolerated by normal teenagers and teenagers with ADHD. The feasibility of normal minors participating in research involving radiation was established.

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