The results of a recent study indicate that there are two types of attention-deficit/hyperactivity disorder (ADHD).
One is known as “developmental ADHD” and is related to genetic factors.
The other appears to be linked to a “mild traumatic brain injury, such as a concussion.”
Brain trauma such as a concussion is not out of the ordinary with 20 % of teens reporting a “mild traumatic brain injury.”
The study evaluated the “origins” of ADHD in 418 youth aged 8-22.
The results of the study indicate that understanding the source of the brain injury may determine different kinds of treatment.
Sonja Stojanovski, Daniel Felsky, Joseph D. Viviano, Saba Shahab, Rutwik Bangali, Christie L. Burton, Gabriel A. Devenyi, Lauren J. O’Donnell, Peter Szatmari, M. Mallar Chakravarty, Stephanie Ameis, Russell Schachar, Aristotle N. Voineskos, Anne L. Wheeler. Polygenic Risk and Neural Substrates of Attention-Deficit/Hyperactivity Disorder Symptoms in Youths With a History of Mild Traumatic Brain Injury. Biological Psychiatry, 2018; DOI: 10.1016/j.biopsych.2018.06.024