I participate in a weekly Asberger support group. I have been doing it for the past several years. We talk about various topics in each session. Today the question was raised about Autism and ADHD.

Unfolding Autism and ADHD
Autism and attention deficit hyperactivity disorder (ADHD) often overlap, making it difficult to disentangle their biology. A new review probed the patterns of brain foldsknown as gyrification, in the cortex of people with either condition. Across 24 papers — 20 focused on autism — the researchers found no differences in cortical gyrification between controls and people with either condition. It is possible these differences really don’t exist. It’s also possible, however, that they are too subtle or varied to be picked up in such a research review, the researchers note. Differences may only emerge in controlled studies using the same protocols to compare people with the two conditions.

The work was published in Cerebral Cortex in December.