Learning to read is good for the brain

November 12, 2010 by Lin Edwards, Medical Xpress report
Activation specific to ex-illiterates during sentence reading. For more details, see the original publication: Science, DOI:10.1126/science.1194140

(PhysOrg.com) -- A new study from researchers in Europe has found literacy improves brain function even in people who learn to read as adults.

Cognitive neuroscientist Stanislas Dehaene from the Institut National de la Santé et de la Recherche Medicale in Gif-sur-Yvette in France and colleagues from Belgium, Brazil and Portugal, used functional magnetic resonance imaging (fMRI) to study the brains of 63 adults, of whom 10 were illiterate, 22 learned to read as , and 31 who learned to read as children.

They found the brains of subjects who were literate showed more vigorous responses to written words in brain regions known to process visual information and in areas of the left temporal lobe, which is known to respond to spoken language. These changes were seen in both groups of literate people.

Reading and writing have been human activities for only around 5,000 years, which is not long enough for major evolutionary changes. The ability to read therefore is likely to lie in brain circuits that originally evolved for other purposes, and the new study suggests these circuits evolved in support of spoken language.

There is something of a trade-off however, as the illiterate volunteers used a larger area of the left occipital-temporal cortex region of the brain to respond to images of faces than in the literate subjects. This may mean literate people are less adept at recognizing faces, and experiments are underway to see if this is true.

The new study follows on from earlier research by psychologist Marcel Just from Carnegie Mellon University in Pittsburgh that showed 100 hours of remedial training for children who were poor readers resulted in a corresponding growth of the white matter fibers in the frontal lobe of the brain. White matter is the brain tissue that transports signals between regions of gray matter where information is processed. As the children improved at reading the amount of increased and its efficiency also improved.

Just’s research was the first to demonstrate that repeated cognitive exercises altered the cortical connectivity in the human . In other words, learning to better basically re-wired the children's brains.

More information: How Learning to Read Changes the Cortical Networks for Vision and Language, Stanislas Dehaene et al., Published Online November 11, 2010. Science, DOI:10.1126/science.1194140

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3 comments

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kaasinees
not rated yet Nov 12, 2010
Where do all these "no shit sherlock" articles come from?
rgwalther
not rated yet Nov 12, 2010
Duhhh???? Being dead slows learning.
Ruhal_Hazim
5 / 5 (2) Nov 12, 2010
I don't think the point of this is just that reading is good for the brain, as any learning of novel complex cognitive activity could be deemed "good" for the brain, but more precisely how reading is good for the brain. We get a better picture of where increases in activity lie and what differences are in the brains of literate vs. illiterate individual, and, perhaps a window into why that particular pathway is active to begin with and what is the broader picture in that activity.

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