Hundreds of variations in genes which more frequently occur among attention-deficit hyperactivity disorder (ADHD) sufferers have been identified by researchers, many of which were known about previously as crucial for behavior and learning.

The variations seen have a broader impact on DNA structure, involving copy number variations (CNVs) which involve repeated or missing stretches of DNA. Many diseases, including schizophrenia and autism, are known to involve CNVs.

Psychiatrist Josephine Elia, M.D., said: "Because the gene alterations we found are involved in the development of the nervous system, they may eventually guide researchers to better targets in designing early intervention for children with ADHD."
     

Source: www.physorg.com