Completed Psychology & Behaviour Brain & Nervous System

Understanding the Inattentive and Impulsive Brain

In plain English

AI plain-English summary

A stroke patient can hold a thought for a moment, then lose it entirely—this programme will test whether that is a form of ultra-rapid forgetting from working memory. Inattention and impulsivity cut across stroke, Parkinson’s disease, and ADHD, yet the underlying brain mechanisms remain poorly understood. Current treatments are often blunt tools because they target symptoms without knowing the precise cognitive glitches at work. This research aims to pin down those glitches: whether impulsivity stems from an oversensitivity to rewards, whether apathy reflects the opposite, and how risky decision-making interacts with attention failures. If successful, the work could sharpen diagnosis and treatment for millions of people. A patient with Parkinson’s might receive a drug that specifically tunes reward sensitivity rather than a general dopamine boost. A stroke survivor might get cognitive training tailored to memory decay speed rather than generic attention exercises. The project also tests a new computational model of how working memory protects information from interference—fundamental science that, if validated, could reshape how neuroscientists think about attention itself. No immediate consumer product will emerge, but deeper understanding of these circuits often seeds unexpected clinical breakthroughs, as happened when basic work on dopamine led to Parkinson’s therapies.

View original technical description
Inattention and impulsivity are complex syndromes that impact significantly on a range of disorders, including focal brain lesions (e.g. stroke), neurodegenerative conditions (e.g. Parkinson's disease, PD) and developmental disorders (e.g. attention deficit hyperactivity disorder, ADHD). To understand mechanisms underlying these behavioural syndromes we need to improve current knowledge of attention, working memory and rapid decision-making under risk, and examine whether they can be modulated effectively by drugs. This programme of research will characterize such mechanisms in healthy people and patients with stroke, PD and adult ADHD. We will: 1. Establish whether one type of inattention might be ultra-rapid forgetting of information held in working memory; 2. Determine if one aspect of impulsivity might be hypersensitivity to rewards while conversely apathy might be associated with insensitivity to rewards; 3. Define whether some types of inattention interact with rapid decision-making under risk to contribute to impulsivity or apathy; 4. Modulate attention and decision-making using dopamine receptor agonists in healthy people and patients with stroke and PD; 5. Test a new model that we have developed to see if it provides a better way to understand how information is maintained and protected from loss in working memory.

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Researchers

Masud Husain (EPMC Awardee)

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Original classification

Principal Research Fellowship (New)

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