Neuroscientists reported Sunday, November 13, 2011 at the conference of the Society for Neuroscience that "a brain area that helps orchestrate mental activity works overtime in children with ADHD, reflecting the 'internal struggle to hold more than one thing in mind at a time.'"  The study was led by Tudor Puiu, a Wayne State University biologist.  lThese scientists used a functional magnetic imaging scanner (fMRI), the same as is used to check for concussions in more advanced facilities, "to track signs of neural activity among 19 affected children and 23 other children who were asked to remember a simple sequence of letters."  It was found that the dorsal anterior cingulate cortex was forced to work much harder and "perhaps less efficiently" among children with attention problems.  This "fundamental difference inbrain function might be an underlying cause of the inattentiveness, impulsivity and focus problems that make it hard for ADHD children to concentrate in the classroom," according to  the study leaders at the annual gathering of some 31,000 brain science researchers in Washington, D.C.  

The study is of considerable significance, as some two million children in the U.S. have been diagnosed with attention prolembs, broadly speaking.  The U.S. Health Resources and Services Administration notes that the problem is apparently growing more common, perhaps as it is better diagnosed, or perhaps as a factor of growing environmental influences.  

The researchers noted that these findings add to previous finds that suggest that the brain of an ADHD affected child actually matures normally, "but it may take up to three years longer to fully develop, especially in areas at the front of the brain's cortex, an outer layer of tissue important in controlling attention, reasoning, and planning."  

In a separate finding earlier this month, researchers at New York University's Langone School of Medicine noted that chldren with ADHD "appeared to have significantly thinner cortex and less gray matter than other children in some areas involved in regulating attention and emotion."