How do neurotransmitter changes in brain structure and function cause ADHD?

PostedAugust 18, 2025

UpdatedSeptember 4, 2025

ByMy Patient Advice

Author: Harriet Winslow, BSc | Reviewed by: Dr. Rebecca Fernandez, MBBS

Neurotransmitters ADHD brain function plays a crucial role in understanding how ADHD develops. Neurotransmitters are chemicals that transmit signals between nerve cells in the brain, and changes in their levels or function are closely linked to ADHD. The brain’s neurotransmitter systems, particularly those involving dopamine, norepinephrine, and serotonin, are essential for regulating attention, behaviour, and impulse control. ADHD symptoms can be greatly exacerbated by disturbances in these systems.

Chemical imbalance in ADHD occurs when the levels of certain neurotransmitters are too low or too high, leading to problems with focus, self-regulation, and mood.
For instance, reduced dopamine activity in the prefrontal cortex can impair attention and decision-making, while abnormalities in norepinephrine regulation can lead to difficulty managing stress or emotions. Even though they might not have any structural brain damage, people with ADHD frequently struggle to maintain attention and control their impulses, which can be explained by these changes in neurotransmitter function.

Common Symptoms Linked to Neurotransmitter Changes and ADHD

Here are some common symptoms related to neurotransmitters ADHD brain function:

Difficulty focusing and staying on task

People with ADHD often find it challenging to concentrate, particularly on tasks that require sustained attention. This is commonly linked to dopamine imbalances in the prefrontal cortex.

Impulsivity and emotional regulation issues

Impulsive behaviours, such as acting without thinking or emotional outbursts, are common in ADHD. These symptoms are often caused by chemical imbalances in the dopamine and serotonin systems.

Visit providers like ADHD Certify for personal consultations and expert advice tailored to your needs.

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to Brain structure and Function.

Harriet Winslow, BSc

Author

Harriet Winslow is a clinical psychologist with a Bachelor’s in Clinical Psychology and extensive experience in behaviour therapy and developmental disorders. She has worked with children and adolescents with ADHD, autism spectrum disorder (ASD), learning disabilities, and behavioural challenges, providing individual and group therapy using evidence-based approaches such as CBT and DBT. Dr. Winslow has developed and implemented personalised treatment plans, conducted formal and informal assessments, and delivered crisis intervention for clients in need of urgent mental health care. Her expertise spans assessment, treatment planning, and behavioural intervention for both neurodevelopmental and mental health conditions.

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.