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Broca _ Wernicke _Geshwind added_

Broca _ Wernicke _Geshwind added_ -...

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http://thebrain.mcgill.ca/flash/d/d_10/d_10_cr/d_10_cr_lan/d_10_cr_lan.html There is a neural loop involved both in understanding and producing spoken language. At the frontal end of this loop lies Broca's area , associated with production of language , or language outputs. At the other end (superior posterior temporal lobe), W ernicke's area , is associated with processing of words that we hear being spoken, or language inputs . ------------------------------------------------------------------------------------------------- For many years, scientists’ understanding of how the brain processes language was rather simple: they believed that Wernicke’s area interpreted the words that we hear or read, then relayed this information via a dense bundle of fibres to Broca’s area , which generated any words that we spoke in response. But subsequent experiments with brain imaging have revealed the existence of a third region of the brain that is also indispensable for language. This region is the inferior parietal lobule, also known as “Geschwind’s territory ”, in honour of the American neurologist Norman Geschwind , who foresaw its importance as early as the 1960s. Brain imaging studies have now shown that the inferior parietal lobule is connected by large bundles of nerve fibres to both Broca’s area and Wernicke’s area. Information might therefore travel between these last two areas either directly, via the arcuate fasciculus, or by a second, parallel route that passes through the inferior parietal lobule. BROCA’S AREA , WERNICKE’S AREA, AND OTHER LANGUAGE-PROCESSING AREAS IN THE BRAIN The process of identifying the parts of the brain that are involved in language began in 1861, when Paul Broca, a French neurosurgeon, examined the brain of a recently deceased patient who had had an unusual disorder. Though he had been able to understand spoken language and did not have any motor impairments of the mouth or tongue that might have affected his ability to speak, he could neither speak a complete sentence nor express his thoughts in writing. The only articulate sound he could make was the syllable “tan”, which had come to be used as his name.
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Paul Broca Tan’s brain When Broca autopsied Tan’s brain, he found a sizable lesion in the left inferior frontal cortex. Subsequently, Broca studied eight other patients, all of whom had similar language deficits along with lesions in their left frontal hemisphere. This led him to make
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Broca _ Wernicke _Geshwind added_ -...

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