A roadblock in the brain makes reading difficult for people with dyslexia, a new study suggested Thursday, contradicting long-held opinion.

The findings in the US journal Science add to an ongoing debate over whether the inherited neurological disorder is caused by faulty brain wiring or the brain’s inability to understand the interaction of sounds and symbols that form language.

Dyslexia is a learning disability that affects about 10 percent of the population and occurs among people of all economic and ethnic backgrounds.

The findings were based on brain scans of 23 people with dyslexia and 22 without, showing dyslexics understand the sound units fine but lack the brain connections to 2%.

via Dyslexia may be due to faulty brain wiring, study says (Update).