Case of mistaken patterns: Slow brain development linked to ADHD for years might just be sex differences

Figuring out the causes of why children develop attention-deficit/hyperactivity disorder (ADHD) has been on scientists' radar for a few decades now. A common notion that has been around for nearly 20 years is that ADHD is caused by a delayed maturation of the brain's cortex, the outermost layer of gray matter.