"Growing evidence from [brain imaging] studies may help better reconceptualize ADHD by linking brain-based features with improved clinical care models and treatment outcomes," writes psychologist Jacqueline Saad and colleagues in their new paper, published in PLOS One. This latest study, which looked at white matter parts of the brain, didn't observe any structural differences associated with ADHD. This is not a setback as the findings represent a sustained effort from researchers to recognize and understand brain features underpinning ADHD.