“Both autism spectrum disorder (ASD) and attention-deficit hyperactivity disorder (ADHD) are conditions where the development of the brain has been affected in some way. This is known as a neurodevelopment disorder.

This means that both ASD and ADHD affect the central nervous system, potentially impacting social and focusing skills, language, movement, and memory. Much research has established that the two conditions typically coexist in patients, but there is no conclusive evidence to suggest why this is.”

https://www.elemy.com/studio/mood-disorders/adhd-and-autism/