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Sign language study shows multiple brain regions wired for language
Date:4/29/2010

A new study from the University of Rochester finds that there is no single advanced area of the human brain that gives it language capabilities above and beyond those of any other animal species.

Instead, humans rely on several regions of the brain, each designed to accomplish different primitive tasks, in order to make sense of a sentence. Depending on the type of grammar used in forming a given sentence, the brain will activate a certain set of regions to process it, like a carpenter digging through a toolbox to pick a group of tools to accomplish the various basic components that comprise a complex task.

"We're using and adapting the machinery we already have in our brains," said study coauthor Aaron Newman. "Obviously we're doing something different [from other animals], because we're able to learn language unlike any other species. But it's not because some little black box evolved specially in our brain that does only language, and nothing else."

The team of brain and cognitive scientists comprised of Newman (now at Dalhousie University after beginning the work as a postdoctoral fellow at the University of Rochester), Elissa Newport (University of Rochester), Ted Supalla (University of Rochester), Daphne Bavelier (University of Rochester), and Peter Hauser (Rochester Institute of Technology) - published their findings in the latest edition of the journal Proceedings of the National Academies of Sciences.

To determine whether different brain regions were used to decipher sentences with different types of grammar, the scientists turned to American Sign Language for a rare quality it has.

Some languages (English, for example) rely on the order of words in a sentence to convey the relationships between the sentence elements. When an English speaker hears the sentence "Sally greets Bob," it's clear from the word order that Sally is the subject doing the greeting and Bob is the object being greeted, not vice versa.

Other languag
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Contact: Alan Blank
alan.blank@rochester.edu
585-314-9785
University of Rochester
Source:Eurekalert

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