What Does PET Imaging Reveal in ADHD Studies? 

ADHD PET imaging offers valuable insight into how the brain’s metabolism and neurotransmitters behave in people with ADHD. PET scans have revealed metabolism changes in key brain regions, particularly the prefrontal cortex and basal ganglia, which are involved in attention, decision‑making, and reward processing. These findings suggest that ADHD is associated with altered brain activity rather than structural damage alone. 

Several PET studies show reduced glucose metabolism in the prefrontal cortex during rest and attention tasks in adults with ADHD. Moreover, PET imaging has repeatedly implicated neurotransmitter dysfunction, especially in the dopamine system, and sometimes in serotonin or norepinephrine pathways. Although results are promising, they are not perfectly consistent: different studies find varying degrees of alteration depending on age, ADHD subtype, or medication status.  

Common Symptoms Reflected in PET Findings 

Here are key ADHD symptoms that seem to map to what PET scans reveal, and how treatments may help: 

Inattention and Poor Task Focus 

Lower metabolism in the prefrontal cortex often correlates with difficulties sustaining attention and following through on tasks. Medication, particularly stimulants, can increase metabolic rates in this region. CBT can help by teaching approaches to improve organisation, sustained focus, and goal‑setting. 

Impulsivity and Reward Processing Issues 

Altered neurotransmitter function, especially with dopamine in the basal ganglia, can be linked to impulsivity, procrastination, or poor response to delayed rewards. Medication targets these systems to improve regulation, and behavioural therapy helps individuals develop coping strategies and better decision‑making skills. 

Visit providers like ADHD Certify for personal consultations tailored to your ADHD care and support needs.  

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to ADHD PET imaging.