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BMB_4_7_11 - Hemispheric Specialization Neuroanatomy of...

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Hemispheric Specialization
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Neuroanatomy of Language
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Broca’s Area Expressive speech Ventrolateral prefrontal cortex (left hemisphere) (Area triangularis)
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Broca’s Aphasia Impaired speech production (motor aspects) Comprehension unimpaired Reading & writing unimpaired Patients are aware of disability Example: "Son ... University ... Smart ... Boy ... Good ... Good ... " http://www.youtube.com/watch?v=f2IiMEbMnPM
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Broca’s Patient: “Tan”
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Video 6
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Arcuate Fasciculus Fiber tract that connects Broca’s and Wernicke’s areas
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Conduction Aphasia Speech is fluent, but meaningless Unable to repeat phrases correctly Comprehension & reading can be relatively intact
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Other Language Disturbances Transcortical Motor: anterior/superior frontal areas Telegraphic speech and perseverative, but good comprehension. Transcortical Sensory: temporal (auditory/visual cortex; behind Wernicke area) Poor comprehension, reading, & writing, but intact expressive language.
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