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Study Points to Neural Basis for Social Deficits in ADHD Kids

Study Points to Neural Basis for Social Deficits in ADHD Kids

New research finds evidence of differences in brain function in kids with attention-deficit/hyperactivity disorder (ADHD) that may underlie problems recognizing emotion in facial expressions.

Children with ADHD frequently exhibit inattention, hyperactivity, and impulsivity. These behaviors may explain why they are often excluded from peer activities, according to researchers led by Ryusuke Kakigi, M.D., Ph.D., of Japan’s National Institutes of Natural Sciences.

The researchers measured changing blood flow in the brain — called hemodynamics — to uncover the neural basis for the recognition of facial expression; they found differences between children with ADHD and typically developing children.

In the study, researchers showed images of a happy expression or an angry expression to 13 children with ADHD and 13 typically developing children and identified the area of the brain the expressions activated.

Investigators used non-invasive near-infrared spectroscopy to measure brain activity. Near-infrared light, which normally passes through the body, was projected through the skull and the absorbed or scattered light was measured.

The strength of the light depends on the concentration of oxyhemoglobin — the oxygen-loaded form of hemoglobin, the predominant protein in red blood cells — which fuels the active neurons.

Typically developing children showed significant hemodynamic response to both the happy expression and angry expression in the right hemisphere of the brain.

But kids with ADHD had a significant hemodynamic response only to the happy expression; there was no specific brain activity seen for the angry expression.

The researchers suggested this difference might be responsible for ADHD children’s difficulties with social recognition and establishing peer relationships.

The findings are discussed in the online journal Neuropsychologia.

Source: National Institutes of Natural Sciences (Japan)

Study Points to Neural Basis for Social Deficits in ADHD Kids

Rick Nauert PhD

Rick Nauert, PhDDr. Rick Nauert has over 25 years experience in clinical, administrative and academic healthcare. He is currently an associate professor for Rocky Mountain University of Health Professionals doctoral program in health promotion and wellness. Dr. Nauert began his career as a clinical physical therapist and served as a regional manager for a publicly traded multidisciplinary rehabilitation agency for 12 years. He has masters degrees in health-fitness management and healthcare administration and a doctoral degree from The University of Texas at Austin focused on health care informatics, health administration, health education and health policy. His research efforts included the area of telehealth with a specialty in disease management.

APA Reference
Nauert PhD, R. (2015). Study Points to Neural Basis for Social Deficits in ADHD Kids. Psych Central. Retrieved on December 17, 2018, from https://psychcentral.com/news/2014/09/29/study-points-to-neural-basis-for-social-deficits-in-adhd-kids/75523.html

 

Scientifically Reviewed
Last updated: 6 Oct 2015
Last reviewed: By John M. Grohol, Psy.D. on 6 Oct 2015
Published on PsychCentral.com. All rights reserved.