A recent video about ADHD brain scans raises a question many adults have asked for years: why can emotional overwhelm be the hardest part of ADHD when the diagnostic criteria focus on attention, hyperactivity, and impulsivity?
In the video, NEW Brain Scan Study Just Split ADHD Into 3 Types, psychiatrist Dr. Sasha Hamdani discusses a 2026 study that identified three patterns in brain-imaging data from children with ADHD. The research is promising. It also needs careful interpretation: the study did not establish three new diagnoses, create an ADHD brain-scan test, or show which treatment works best for each person.
TL;DR
- A 2026 JAMA Psychiatry study by Pan and colleagues used structural MRI from 446 children with ADHD to identify three brain-network patterns, which the researchers called “biotypes.”
- The groups were formed from brain data alone. The researchers added the descriptive labels afterward, including “emotional dysregulation” for the most severe group.
- In a follow-up subset, emotional self-regulation difficulties persisted in that group while they eased in the other two.
- The groups overlapped, the symptom differences between them were small, and the researchers say the “types” may be points on a continuum rather than separate categories.
- No brain scan can currently tell you which “type” of ADHD you have, and this study does not change how ADHD is diagnosed or treated.
- If emotional overwhelm is a big part of your experience, it belongs in an assessment conversation, whether or not it turns out to be ADHD.
What did the 2026 ADHD brain-scan study actually find?
Short answer: Researchers found three statistically distinct patterns in how the brain networks of children with ADHD differed from typical development. The patterns lined up loosely with symptom differences. They are research groupings, not diagnoses.
The study analyzed structural MRI scans from 446 children with ADHD and 708 children without ADHD, collected at six research sites in China and the United States. The researchers compared measurements of each child’s brain-network organization with age- and sex-related reference ranges, an approach that works much like a pediatric growth chart. A statistical algorithm then looked for patterns among the children with ADHD. The researchers repeated the analysis in a separate, independent group of 554 children with ADHD.
The order of steps matters. The groups were formed from imaging measurements alone; symptom scores played no part in the sorting. Only afterward did the researchers compare symptoms across the groups and give each one a descriptive label.
| Research label | Children | What stood out |
|---|---|---|
| Severe-combined with emotional dysregulation | 142 | Highest average scores for both inattention and hyperactivity/impulsivity, and the most widespread brain-network differences |
| Predominantly hyperactive/impulsive | 177 | The largest group, with relatively more hyperactivity/impulsivity and less inattention than the inattentive-labelled group |
| Predominantly inattentive | 127 | Relatively more inattention than the hyperactive-labelled group, and the fewest network differences |
These are research labels for patterns in this study. They are not categories a clinician can assign during an ordinary assessment.
The groups also overlapped in their symptoms. The “predominantly inattentive” group did not have the highest average inattention score; the severe-combined group did. Overall, the differences were small. Which brain-network group a child fell into accounted for less than 2% of the variation in their symptom scores.
Why does the emotional dysregulation finding matter?
Short answer: It is a signal, not a settled fact, that emotional difficulties may be central to some people’s ADHD and not just a side effect.
A subset of children at one of the study sites was followed yearly for up to four years, beginning before any of them took ADHD medication. Over that time, emotional self-regulation difficulties stayed more persistent in the severe-combined group and decreased noticeably in the other two groups. These difficulties were measured with a widely used parent-report checklist. The effects were small to modest. The groups did not differ in how their attention or behaviour problems changed over the same period.
That finding still deserves attention. Trouble recovering after frustration, managing a strong emotional reaction, or staying functional when overwhelmed can matter enormously in someone’s daily life. A symptom checklist may not fully capture any of it.
The finding also fits a broader body of adult research. A 2023 systematic review in PLoS One by Soler-Gutiérrez and colleagues found that adults with ADHD more often rely on less helpful emotion-regulation strategies. The review also found that emotional dysregulation is associated with greater symptom severity and with other mental health conditions.
The video makes this point vividly, including Dr. Hamdani’s description of adults who have tried many antidepressants for what she believes was ADHD-related emotional dysregulation. But the study did not test whether adults with emotional dysregulation had been misdiagnosed. It also did not establish that a strong response to criticism or rejection is specific to ADHD.
An adult can have ADHD alongside anxiety, depression, trauma-related difficulties, or other concerns. A good assessment makes room to explore these possibilities rather than assuming that one explanation rules out all the others.
Where does the video go further than the study?
Dr. Hamdani is careful about several important points. She says plainly that this is not a diagnostic scan, and she flags the study’s reliance on children, most of them boys. But a few statements in the video go further than the paper supports.
How the emotional group was identified. The video describes the algorithm as finding emotional dysregulation “on its own.” In fact, the algorithm grouped children using brain-imaging data only. The researchers then compared symptom measures across the groups and gave the group with the most severe overall scores its “emotional dysregulation” label. The brain data produced the groupings; people produced the descriptions.
Which group was largest. The video opens by calling the emotionally dysregulated group the biggest. Later, Dr. Hamdani correctly identifies the hyperactive/impulsive-labelled group as the largest, with 177 children compared with 142. The emotionally dysregulated group was the most severe on the reported symptom measures, not the largest.
Which group was most inattentive. The video describes the “inattentive” group as scoring highest on inattention. In the paper, the severe-combined group had the highest average inattention score. The inattentive-labelled group scored higher only than the hyperactive/impulsive group.
Mood disorders. The video highlights the difference in later mood disorders. In the follow-up sample, 25.0% of the severe-combined group developed one, compared with 9.8% and 5.0% in the other two groups. That difference was not statistically significant. These numbers cannot reliably predict what will happen to an individual child.
Can a brain scan tell you which type of ADHD you have?
No, not at this point. The researchers calculated complex network measures from MRI images and compared patterns across groups. They did not find three visibly distinct kinds of brain, and they did not test a scan that could diagnose ADHD in an individual patient. The authors themselves raise the possibility that the groups reflect points along a continuum rather than fixed categories.
The researchers also compared each group’s brain patterns with existing maps of brain chemical systems, an analysis often quoted in coverage of the study. The authors state plainly that this comparison cannot show actual chemical changes in these children or guide treatment choices.
What are the study’s main limitations?
- Children, not adults. Participants were 6 to 18 years old, with an average age of about 11.
- Mostly boys. About 76% of the children with ADHD in the main sample were male. The findings cannot simply be applied to adult women or men.
- Small symptom differences. The groups overlapped substantially, and brain-network grouping explained very little of the variation in symptoms.
- Partial replication. The hyperactivity/impulsivity differences held up in the second group of children; the inattention differences did not.
- Narrow follow-up. The emotional-trajectory finding comes from a subset of children at a single site.
- Real-world fit. Some sites excluded children with other conditions, which limits how well the results apply to everyday practice, where co-occurring conditions are common. Most participants were also not medication-naive.
- No treatment findings. The study did not show that people in the three groups need different medications or therapies.
Dr. Hamdani also notes several of these limitations in the video.
The scan-shaped answer: why a “type” can feel like relief
When something has been hard for a long time, and especially when it has been misread as a character flaw, a brain-based label can feel like an enormous relief. We call this the scan-shaped answer: an explanation that looks objective, biological, and final, as though it settles the question from outside you.
That pull is understandable, and the recognition behind it is real. If a description of “emotionally dysregulated ADHD” made you feel seen, that matters.
But a scan-shaped answer can also close a question too early. It can lead someone to overlook a co-occurring condition. It can lead them to dismiss their own experience because it doesn’t match a “type.” Or it can keep them waiting for a test that doesn’t exist yet.
For adults, the useful question is therefore not “Which scan-defined type am I?” It is “What is happening across my attention, emotions, daily functioning, and history, and what support would help?”
What should you do if the video resonated with you?
If emotional overwhelm is part of what brought you to an ADHD website, it is worth discussing. You do not need to decide in advance whether it “counts” as ADHD. Likewise, being able to sit still or appear organized does not, by itself, settle the question.
An assessment can look at longstanding patterns, current challenges, impairment, and other possible explanations, rather than relying on a single experience or an online description of a “type.” Before you begin, it helps to notice a few things:
- Recovery time. How long does it take you to come back to baseline after frustration, criticism, or a plan falling apart: minutes, hours, or the rest of the day?
- Triggers. Do strong reactions cluster around interruption, overwhelm, feeling misunderstood, or switching tasks?
- Timeline. Has this been part of your life since childhood? Or did it start or worsen during a particular period, such as after a loss, a burnout, or a change in sleep?
- Settings. Does it show up at work, at home, and in relationships, or mainly in one place?
- Previous explanations. Have you been told before that this was anxiety, depression, or “just stress”? What helped, and what didn’t?
You don’t need tidy answers. Brief, honest observations give a clinician far more to work with than a self-assigned type.
Getting assessed for ADHD in Saskatchewan
Brain imaging is not part of standard ADHD assessment, and this study does not change that. ADHD is assessed clinically: through your history, your current functioning, standardized questionnaires, and careful attention to other possible explanations.
At SaskADHD, our approach to adult ADHD care considers how attention, emotional regulation, stress, and everyday functioning fit together. We offer clinical assessment and therapy, not brain-scan typing or a promise that one research finding can explain every person’s experience. The goal is a clearer understanding of your needs and a practical plan for what comes next.
A few practical points for adults in Saskatchewan:
- Services are delivered by telehealth across the province, so you can be seen from a rural or northern community without travelling to a city.
- You can begin adult screening without a referral.
- Screening is fee-exempt for NIHB-eligible clients.
- Screening is reviewed by a clinician and includes a conversation about next steps. It does not diagnose or rule out ADHD.
The bottom line: This study strengthens the case for taking emotional difficulties seriously in ADHD research and clinical conversations. It does not change how ADHD is diagnosed today. If the video resonated with you, treat that recognition as a reason to ask better questions, not as a diagnosis.
Frequently asked questions
Are there really three types of ADHD?
Clinically, ADHD is still described as predominantly inattentive, predominantly hyperactive/impulsive, or combined. The 2026 study found three brain-imaging patterns in children. They are research groupings, not new diagnoses, and the authors note they may be points on a continuum.
Did the brain scans find emotional dysregulation on their own?
No. The algorithm sorted children using brain-imaging data only. The researchers then compared symptoms across the resulting groups and labelled the most severe one “severe-combined with emotional dysregulation.”
Can an MRI diagnose ADHD?
No. This study compared groups of children and did not test whether a scan can diagnose an individual. Brain imaging is not part of standard ADHD assessment; diagnosis relies on a clinical assessment of history, symptoms, and daily functioning.
Is emotional dysregulation a symptom of ADHD?
Emotional dysregulation is not one of the core diagnostic criteria for ADHD, but it is common, especially in adults. Research links it with greater symptom severity and more co-occurring conditions. It can also have other causes, which is why it deserves careful assessment rather than assumption.
Does the brain-scan study apply to adults?
Not directly. The participants were children aged 6 to 18, and most were boys. The findings raise useful questions about emotional difficulties across the lifespan, but they cannot be applied to adults without further research.
What should I bring to an ADHD screening if emotions are my main concern?
Notice how long it takes you to recover after frustration, what tends to trigger strong reactions, when the pattern began, and where it shows up. Note any previous explanations you’ve been given. Brief notes are enough.
This article is educational and is not a substitute for an individual clinical assessment. If you are in immediate danger, call 911. For suicide crisis support in Canada, call or text 988.
References
Hamdani, S. [@thepsychdoctormd]. (2026, September). NEW brain scan study just split ADHD into 3 types [Video]. YouTube. https://www.youtube.com/watch?v=ymYCBhCthMA
Pan, N., Long, Y., Qin, K., et al. (2026). Mapping ADHD heterogeneity and biotypes by topological deviations in morphometric similarity networks. JAMA Psychiatry, 83(5), 478–490. https://doi.org/10.1001/jamapsychiatry.2026.0001
Soler-Gutiérrez, A. M., et al. (2023). Evidence of emotion dysregulation as a core symptom of adult ADHD: A systematic review. PLoS One, 18(1), e0280131. https://doi.org/10.1371/journal.pone.0280131
