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Autism problems explained in new research

New research from Melbourne's Howard Florey Institute helps to explain why children with autism spectrum disorders (autism) have problem-solving difficulties.

Using functional magnetic resonance imaging technology (fMRI) the Florey scientists have shown that children with autism have less activation in the deep parts of the brain responsible for executive function (attention, reasoning and problem solving).

Research leader Dr Ross Cunnington said autism was known to have a biological cause, but this neuroimaging research clearly showed the dysfunction in the brain that accounted for why children with autism have problems with their executive function.

"Discovering why children with autism have impaired executive function may help develop better therapies to improve their ability to pay attention and solve problems," Dr Cunnington said.

Specifically, we found that activity in the caudate nucleus, a critical part of circuits that link the prefrontal cortex of the brain, is reduced in boys with autism."

"These findings have important implications, since prefrontal brain circuits play a critical role in maintaining and focusing attention, planning and setting goals, and keeping goals in memory during problem-solving and decision-making."

"Our neuroimaging findings showing dysfunction in these prefrontal brain circuits now explain why children with autism have problems with learning and problem-solving," he said.

Dr Cunnington along with PhD student, Tim Silk, have also been studying children with attention deficit hyperactivity disorder (ADHD) and have found similarities in the impairment of specific executive function in children with ADHD and autism.

The autism study was conducted with boys aged 11 to 18 years who had autism or Asperger's disorder, as well teenage boys without the condition.

Autism affects one in 100 Australians and is lifelong condition that affects the way a person communicates and
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Contact: Merrin Rafferty
61-383-441-658
Research Australia
24-Oct-2005


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