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Examples
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In a study published in the journal Science, the researchers report that the brain processes lexical, grammatical and phonological information in a well defined sequence that lasts less than half a second, and that a single language centre known as Broca's Area is involved in all these tasks.
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They recorded from another speech centre called Broca's area, which is located further forward, and revealed new details about its function.
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Broca's Area is named after the French physician Pierre Paul Broca, who identified the brain region during post mortem examinations of two patients who had lost the ability to speak after suffering strokes.
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The three phases of electrical activity were recorded exclusively from Broca's Area, but were recorded at different times and in distinct subregions separated from each other by several millimeters.
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This study shows that Broca's Area is subdivided into functionally distinct regions which are involved in sequential processing of different aspects of language, and that its role in language is far more extensive than previously thought.
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According to the classical neurological model of language, Broca's Area is involved in speech production, and Wernicke's Area, which is located in the temporal lobe, is required for speech comprehension.
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It adds to earlier evidence that Broca's Area is involved in both speech production and comprehension.
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Broca's Area is not associated with identifying words, but it has previously been shown to activated at this timescale in response to lexical information delivered to it from other language areas.
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It is now known that Broca's Area is also involved in other aspects of speech.
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The second component of the signature was recorded at 320 ms after word repesentation, in a region at the back of Broca's Area.
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