Before revision: Attention deficit hyperactivity disorder Magnetic resonance imaging (MRI) studies of 1713 participants shows that ADHD individuals with attention deficit hyperactivity disorder (ADHD) have smaller volumes of the nucleus accumbens, amygdala, caudate, hippocampus, putamen, and overall cortical and intracranial volume; and have less surface area and cortical thickness, compared to people without ADHD.
After revision: Attention deficit hyperactivity disorder Two separate magnetic resonance imaging (MRI) studies of more than 3300 participants (in total) showed that individuals with attention deficit hyperactivity disorder (ADHD) have smaller volumes of the nucleus accumbens, amygdala, caudate, hippocampus, putamen, and overall cortical and intracranial volume; and have less surface area and cortical thickness, compared to people without ADHD.