What Imaging Findings Differentiate ADHD Subtypes? 

ADHD subtypes brain imaging studies have revealed important differences in brain activity and structure that help differentiate between the two primary ADHD subtypes, inattentive vs hyperactive. Research using MRI and functional scans has shown that these subtypes exhibit distinct patterns of brain function, which can explain the unique symptoms of each. 

For example, individuals with the inattentive subtype tend to show less activation in brain regions associated with attention and focus, such as the prefrontal cortex. On the other hand, those with the hyperactive subtype often have irregular activity in areas related to motor control and inhibition, like the basal ganglia and cerebellum. These differences help clarify why people with ADHD experience symptoms differently depending on their subtype. 

Key Imaging Findings for Each ADHD Subtype 

Understanding the brain regions involved in each subtype helps explain the specific symptoms people experience. Below are some common imaging findings associated with the inattentive and hyperactive subtypes: 

Inattentive ADHD Subtype 

Individuals with this subtype often struggle with focus, organisation, and following through on tasks. MRI differences in the prefrontal cortex show lower activity in this area, leading to challenges in attention and executive function. Stimulant medication can increase activity in this region, while CBT helps individuals develop skills for better focus and task completion. 

Hyperactive ADHD Subtype 

The hyperactive subtype is characterised by impulsivity, excessive movement, and restlessness. Functional scans reveal irregularities in the basal ganglia and cerebellum, which influence motor control and inhibition. Medication can help regulate these regions, while behavioural therapy teaches strategies to manage impulsivity and hyperactivity. 

Visit providers like ADHD Certify for personal consultations to better understand how brain imaging can inform ADHD treatment.  

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