Understanding ADHD

Seven Facts About ADHD Every Clinician Should Know

A Dive Deeper Companion for Licensed Clinicians
Companion to: “7 Things to Know About ADHD”
Audience: Licensed clinicians — MFTs, LCSWs, school psychologists, pediatricians, psychiatrists
Plain-language version: Seven Things I Want You to Know About Your Child’s ADHD

Clinical Overview

ADHD is one of the most studied conditions in mental health, and clinicians still miss it, play it down, or label it as something else. Sometimes this goes on for years.

The World Federation of ADHD International Consensus Statement pulled together the work of more than 80 researchers and produced 208 evidence-based conclusions (Faraone et al., 2021). Its central message is plain. ADHD is a real, inherited, impairing neurodevelopmental condition, and it responds to treatment. Recent reviews describe it as a lifelong condition for many people (Posner et al., 2020).

Here are seven facts to anchor your work.

1. ADHD Comes From the Brain, Not From a Lack of Motivation

The most common mistake in practice is treating ADHD as a problem of character. It is a brain-based condition. Group studies find small average differences in children, such as slightly less cortical surface area and smaller deep brain regions (Faraone et al., 2021). Brain growth also runs late. In one NIMH study, the cortex of children with ADHD reached peak thickness at a median age of about 10.5, compared with about 7.5 in other children. The middle of the prefrontal cortex lagged by about five years (Shaw et al., 2007). The pattern of growth stayed normal. It ran on a later schedule.

Brain scans cannot diagnose ADHD in one person. Diagnosis rests on history and on how much the symptoms get in the way. Barkley (2015) frames ADHD as a problem of self-regulation, and that framework still fits the clinic best. The person often knows what to do and struggles to do it in the moment.

2. ADHD Is Highly Inherited

Twin studies put the heritability of ADHD at about 74 percent (Faraone & Larsson, 2019). That ranks among the highest of any mental health condition. A careful family history is part of the evaluation. Parents with undiagnosed ADHD often managed for years on intelligence or structure, then struggled when life got bigger. Finding the family pattern helps with diagnosis and with healing.

3. the Numbers Are Stable, and Recognition Has Improved

About 5.9 percent of youth and 2.5 percent of adults have ADHD worldwide. In youth, boys outnumber girls about two to one (Faraone et al., 2021). The consensus found no rise in true prevalence over three decades, so more diagnoses likely reflect better recognition. Girls, adults, and bright people who masked their symptoms were missed for a long time. Adults often show restlessness inside, and less of it in their movement.

4. Other Conditions Are the Rule

About two out of three children with ADHD have at least one other condition (Larson et al., 2011). Anxiety, mood problems, learning disorders, and sleep problems are among the most common. Having them does not rule out ADHD (Faraone et al., 2021). If your treatment is stalling, look for a missed condition first.

5. the Course Varies, So Keep Watching

The old idea that ADHD fades at puberty does not hold. The Multimodal Treatment Study followed 558 children into young adulthood. About 30 percent reached full remission at some point, and 60 percent of those had symptoms return. Only 9.1 percent stayed in remission. Nearly two-thirds (63.8 percent) moved back and forth (Sibley et al., 2022). Better symptoms in the teen years do not mean ADHD is gone. Review the plan at every life transition.

6. Emotional Reactivity Is Part of ADHD

Researchers now treat emotional dysregulation as a core feature. A systematic review found trouble with frustration, emotional impulsivity, and managing the strength of feelings in most adults with ADHD, and mood disorders did not fully explain it (Soler-Gutiérrez et al., 2023). The consensus statement reports the same in youth (Faraone et al., 2021). When a client shows emotional volatility or sensitivity to rejection, consider ADHD before settling on a personality disorder label.

7. Treatment Works Best When It Has Several Parts

The consensus statement calls stimulant medication highly effective, with the best balance of benefit and risk. It also notes that guideline recommendations are not yet fully carried out in everyday care (Faraone et al., 2021). Skills training, behavior plans, and changes to the setting add what medicine cannot, and they last. EEG biofeedback was rated “probably efficacious” in a formal review, which also called for more controlled trials (Monastra et al., 2005). Skills are always more important than pills over the long run. A prescription pad is a beginning, not a plan.

What Is Happening in the Brain

ADHD involves the chemical messengers dopamine and norepinephrine. They help the front of the brain plan, hold information in mind, and hit the brakes. Both too little and too much can throw that system off, and this is why dosing takes care. Posner and colleagues (2020) offer a clear review of the evidence.

What to Do in Practice

These seven facts are the foundation, not the whole picture. They give you a way of working that takes ADHD seriously, treats the whole person, and keeps watching over time.

The door is open. Change is possible, and the evidence shows where to start.

References

Faraone, S. V., Banaschewski, T., Coghill, D., Zheng, Y., Biederman, J., Bellgrove, M. A., … Wang, Y. (2021). The World Federation of ADHD International Consensus Statement: 208 evidence-based conclusions about the disorder. Neuroscience & Biobehavioral Reviews, 128, 789–818. https://doi.org/10.1016/j.neubiorev.2021.01.022

Barkley, R. A. (Ed.). (2015). Attention-deficit hyperactivity disorder: A handbook for diagnosis and treatment (4th ed.). Guilford Press.

Faraone, S. V., & Larsson, H. (2019). Genetics of attention deficit hyperactivity disorder. Molecular Psychiatry, 24(4), 562–575. https://doi.org/10.1038/s41380-018-0070-0

Larson, K., Russ, S. A., Kahn, R. S., & Halfon, N. (2011). Patterns of comorbidity, functioning, and service use for US children with ADHD, 2007. Pediatrics, 127(3), 462–470.

Monastra, V. J., Lynn, S., Linden, M., Lubar, J. F., Gruzelier, J., & LaVaque, T. J. (2005). Electroencephalographic biofeedback in the treatment of attention-deficit/hyperactivity disorder. Applied Psychophysiology and Biofeedback, 30(2), 95–114. https://doi.org/10.1007/s10484-005-4305-x

Posner, J., Polanczyk, G. V., & Sonuga-Barke, E. (2020). Attention-deficit hyperactivity disorder. The Lancet, 395(10222), 450–462.

Shaw, P., Eckstrand, K., Sharp, W., Blumenthal, J., Lerch, J. P., Greenstein, D., … Rapoport, J. L. (2007). Attention-deficit/hyperactivity disorder is characterized by a delay in cortical maturation. Proceedings of the National Academy of Sciences, 104(49), 19649–19654.

Sibley, M. H., Arnold, L. E., Swanson, J. M., Hechtman, L. T., Kennedy, T. M., Owens, E., … Molina, B. S. G. (2022). Variable patterns of remission from ADHD in the Multimodal Treatment Study of ADHD. American Journal of Psychiatry, 179(2), 142–151. https://doi.org/10.1176/appi.ajp.2021.21010032

Soler-Gutiérrez, A.-M., Pérez-González, J.-C., & Mayas, J. (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


About the author. Dr. Douglas Cowan, Psy.D., is a Licensed Marriage and Family Therapist with 40 years of clinical experience and over 35 years in neurofeedback, licensed and practicing since 1988. Read his full credentials →