Dyslexia Research Papers

Dyslexia Research Papers-11
Injuries to specific parts of the brain can cause people to lose particular skills, like the ability to speak, that sit in those brain regions.But because the brain doesn’t have a discrete reading center, it’s hard to understand how a disorder could handicap reading and only reading.

Injuries to specific parts of the brain can cause people to lose particular skills, like the ability to speak, that sit in those brain regions.But because the brain doesn’t have a discrete reading center, it’s hard to understand how a disorder could handicap reading and only reading.

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“We found the signature everywhere we looked,” says Perrachione.

The results suggest that dyslexic brains have to work harder than “typical” brains to process incoming sights and sounds, requiring additional mental overhead for even the simplest tasks.

The research was supported by the Lawrence Ellison Foundation, the National Institutes of Health, and the National Science Foundation.

In the team’s first experiment, volunteers without dyslexia were asked to pair spoken words with images on a screen while the researchers used functional magnetic resonance imaging (f MRI) to track their brain activity. In one version, they listened to words spoken by a variety of different voices.

The difference was even clearer in dyslexic children between ages six and nine, who were just learning to read; in a similar experiment, their brains didn’t adapt at all to repeated words.

Perrachione and his colleagues wondered if the adaptation glitch was unique to spoken words, or if people with dyslexia would have trouble adapting to other kinds of stimuli, too.

The results could solve a paradox that has stumped dyslexia researchers for decades.

“People with dyslexia have a specific problem with reading, yet there is no ‘reading part’ of our brain,” says MIT neuroscientist John Gabrieli, co-author on the article, who was Perrachione’s Ph D advisor when he conducted much of the research reported in the paper.

Courtesy of Tyler Perrachione But when subjects with dyslexia took the same tests, their brain activity never eased off.

Like a radio that can’t hold a frequency, the brain did not adapt to the consistent voice and had to process it fresh every time, as if it were new.

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