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What Causes Inattention in People with ADHD? 

Author: Dr. Rebecca Fernandez, MBBS

Inattention is one of the hallmark symptoms of ADHD, and understanding its causes is key to effectively managing the condition. For people with ADHD, the difficulty in maintaining focus and attention stems from differences in brain structure and function. The ADHD brain processes information differently, affecting how attention is sustained and regulated. These brain differences contribute to a range of challenges, including distractibility, forgetfulness, and difficulty completing tasks. 

The primary inattention causes of ADHD are tied to disruptions in the brain’s attention mechanisms. In particular, the prefrontal cortex, the area of the brain responsible for executive functions such as planning, organisation, and focus, often shows reduced activity in people with ADHD. This leads to difficulties in sustaining attention, filtering out distractions, and following through on tasks. 

Understanding the Attention Mechanisms in ADHD 

The attention mechanisms in the ADHD brain are impacted by the regulation of neurotransmitters like dopamine and norepinephrine. These chemicals are crucial for attention, motivation, and mood regulation. In ADHD, the brain often has difficulty producing or responding to these neurotransmitters in a way that allows for sustained focus. 

This imbalance can lead to the following symptoms.

  • Difficulty focusing on one task: People with ADHD often find it challenging to stay engaged in a single task, especially if it is long or boring. 
  • Easily distracted: External stimuli or even unrelated thoughts can easily divert attention. 
  • Forgetfulness: Difficulty keeping track of important details or tasks due to poor focus or organisation. 

By understanding these inattention causes, people with ADHD can develop strategies to manage their symptoms more effectively. Cognitive behavioural therapy (CBT), medication, and behavioural interventions can all help improve attention regulation by targeting the root causes. 

For personalised advice and strategies on managing inattention in ADHD, providers like ADHD Certify offer consultations to guide individuals toward effective solutions. 

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

Dr. Rebecca Fernandez, MBBS, author and a reviewer for my patient advice - mypatientadvice.co.uk
Dr. Rebecca Fernandez, MBBS
Author

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 author's privacy.