Dyslexia Research Papers

Dyslexia Research Papers-72
So they tried a second set of experiments, in which they showed subjects a repeating series of words, pictures, or faces, again using f MRI to look for the decline in brain activity that signals neural adaptation.

So they tried a second set of experiments, in which they showed subjects a repeating series of words, pictures, or faces, again using f MRI to look for the decline in brain activity that signals neural adaptation.

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“There’s almost nothing we learn that’s as complicated as reading.” That’s because learning to read is mentally cumbersome.

The human brain did not evolve to read—literacy has been commonplace only in the last two centuries—so the brain must repurpose regions that evolved for very different ends.

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.

This optical illusion shows rapid neural adaptation in action. But look a little longer and you will see a Dalmatian.

(The dog’s nose is in the center of the image and his body extends to the right.) After seeing the Dalmatian once, most people see it every time they view the picture, even if they don’t explicitly remember where to look.

“What was surprising for me was the magnitude of the difference.

These are not subtle differences,” says Perrachione.

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.

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