# What if everything you thought about ADHD was wrong? Neuroscience reveals the real villain behind the disorder, and it is not a lack of concentration.

Learn how recent research shows that the disorder is far more closely linked to reward processing, motivation and impulse regulation than to the mechanical ability to focus.

- Section: Health
- Published: October 22, 2026
- Address: https://ceoone.com.br/en/article/what-if-everything-you-thought-about-adhd-was-wrong-neuroscience-reveals
- Em português: https://ceoone.com.br/artigo/e-se-tudo-o-que-voce-achava-sobre-o-tdah-estivesse-errado-a-neurocienc.md

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Photo: Shawn Day/Unsplash

## Key points

- Analyses by psychiatrist Awais Aftab, published in The New York Times, suggest that treating ADHD only as an attention deficit may be a mistake.
- A study published in the journal Cell showed that stimulants do not directly change the attention networks: they increase the relevance the brain gives to monotonous tasks.
- In childhood, hyperactivity and impulsiveness predominate; from 12 to 18, more than half of cases are of the inattentive subtype, and in adulthood only about 7% keep the hyperactive profile.

In everyday clinical practice, mental health professionals see a growing number of people seeking help for a recurring set of difficulties: reports of being unable to stay focused, memory lapses, disorganization, chronic restlessness and impulsiveness. These people face daily obstacles in dealing with spreadsheets, memos, routine household chores, meeting deadlines and showing up for appointments. These problems are often summarily labeled "attention deficit", as the diagnosis of Attention Deficit Hyperactivity Disorder (ADHD) gains visibility. However, analyses by psychiatrist Awais Aftab, published in The New York Times, suggest that focusing exclusively on "attention deficit" may be a mistaken way of understanding the condition.

The rise in ADHD diagnoses, along with the widespread prescription of stimulants such as Ritalin, has sparked heated debate among the public and the medical community. A study published in the scientific journal Cell went deeper into this discussion by examining the impact of stimulant medication on children's brain circuits. The scientists found that these substances do not directly change the neural networks dedicated to attention itself. Instead, stimulants produce what looks like improved focus because they increase the relevance and salience the brain gives to everyday, monotonous or repetitive activities, making them attractive.

This mechanism explains why amphetamines can have a calming effect on hyperactive children and adults: people with ADHD experience chronic restlessness caused by a lack of stimulation and immediate gratification. When a task is boring and offers no quick reward, the brain actively looks for other stimuli. Further research in neuroimaging and in mapping the dopamine system (mesoaccumbens) supports this view, showing that variations in the brain's reward circuits change the way motivation is processed, and clinically confirming that the search for quick stimuli and the aversion to boredom are real neurobiological responses. In addition, in laboratory tests, hyperactive children showed a clear preference for smaller, immediate rewards over larger but longer-term benefits. Neuropsychologist Russell Barkley coined the term "time blindness" to describe this condition, marked by an inability to regulate emotions and difficulty anticipating future consequences.

## How symptoms change with age

The behavior associated with ADHD is dynamic and changes significantly over the course of life. In childhood, motor hyperactivity and marked impulsiveness predominate, expressed through constant restlessness and resistance to staying seated. As the person grows up and takes on greater academic and social responsibilities, signs of inattention become predominant and persistent.

A systematic review published in 2023 found that, among children under 12, there is an even distribution between the inattentive, hyperactive-impulsive and combined profiles. Between the ages of 12 and 18, more than half of adolescents fall into the inattentive subtype, while fewer than a quarter keep mainly hyperactive traits. In adulthood, a small share, around 7%, keeps the hyperactive profile, with the inattentive or combined forms prevailing. Neuroimaging indicates that these variations result from the ongoing maturation of brain structures.

## Clinical consensus, diagnosis and treatment options

Although neuropsychological assessments, such as tests of working memory and impulse control, identify patterns of difficulty in patients with ADHD, these tests do not point to a single anomaly exclusive to the disorder, which is why they are not the only method of diagnosis. At the same time, aversion to boredom, emotional instability and the fast-paced demands of the 21st century have made the symptoms of the disorder far more visible and at odds with modern routines.

Despite the debate over the risk of overdiagnosis or the supposed medicalization of ordinary behavior, psychiatry holds a solid consensus: ADHD is a real medical problem, associated with higher risks of accidents, morbidity and social harm when left untreated, but one for which highly effective treatments exist. Supervised drug treatment is associated with a proven reduction in deaths, episodes of self-harm, traffic accidents and criminal convictions, helping the nervous system process and manage everyday demands efficiently.

## Sources and editorial notes

- Reference reporting and publications: O Estado de S. Paulo (Mente e Cérebro analysis, article by Awais Aftab via The New York Times, October 21, 2026) and a study in the scientific journal Cell.
- Research and experts cited: Awais Aftab (psychiatrist and professor), Russell Barkley (neuropsychologist, "time blindness"), Edmund Sonuga-Barke (reward tests), neuroimaging research on brain maturation and mapping of the dopamine system (mesoaccumbens).

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