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What Brain Networks Are Altered in Brain Imaging? 

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Updated
ByMy Patient Advice
Author: Phoebe Carter, MSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

In ADHD brain networks, several key networks, such as the default mode network (DMN), executive function, and attention networks, are often altered in brain imaging studies. These disruptions in brain connectivity help explain why individuals with ADHD struggle with symptoms like inattention, impulsivity, and poor emotional regulation. 

Research shows that the default mode network (DMN), which is active during periods of rest and mind-wandering, often fails to deactivate properly when focusing on tasks. This results in the brain becoming distracted and makes it difficult to sustain attention on a task. Similarly, executive function networks, responsible for decision-making, impulse control, and cognitive flexibility, show underactivation in individuals with ADHD, contributing to impulsive behaviours and challenges with planning and organisation. Additionally, attention networks, which are critical for focus and concentration, often exhibit weak connectivity, further impairing attention and task performance. 

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How Altered Brain Networks Impact ADHD Symptoms 

Understanding how these brain networks are altered in ADHD helps explain common symptoms and informs treatment approaches. 

Inattention and Distractibility 

Disruptions in the default mode network (DMN) can lead to constant mind-wandering and difficulty focusing. Stimulant medications can help enhance neural connectivity and improve attention, while CBT provides strategies to manage distractions and improve task organisation. 

Impulsivity and Difficulty with Self-Regulation 

Altered executive function networks can result in impulsive behaviour and poor decision-making. Medication can improve cognitive control, while behavioural therapy can teach better emotional regulation and decision-making strategies. 

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 brain networks.

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Phoebe Carter, MSc
Author

Phoebe Carter is a clinical psychologist with a Master’s in Clinical Psychology and a Bachelor’s in Applied Psychology. She has experience working with both children and adults, conducting psychological assessments, developing individualized treatment plans, and delivering evidence-based therapies. Phoebe specialises in neurodevelopmental conditions such as autism spectrum disorder (ASD), ADHD, and learning disabilities, as well as mood, anxiety, psychotic, and personality disorders. She is skilled in CBT, behaviour modification, ABA, and motivational interviewing, and is dedicated to providing compassionate, evidence-based mental health care to individuals of all ages.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the author's privacy. 

Dr. Rebecca Fernandez, MBBS
Reviewer

Dr. Rebecca Fernandez is a UK-trained physician with an MBBS and experience in general surgery, cardiology, internal medicine, gynecology, intensive care, and emergency medicine. She has managed critically ill patients, stabilised acute trauma cases, and provided comprehensive inpatient and outpatient care. In psychiatry, Dr. Fernandez has worked with psychotic, mood, anxiety, and substance use disorders, applying evidence-based approaches such as CBT, ACT, and mindfulness-based therapies. Her skills span patient assessment, treatment planning, and the integration of digital health solutions to support mental well-being.

All qualifications and professional experience stated above are authentic and verified by our editorial team. However, pseudonym and image likeness are used to protect the reviewer's privacy. 

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