10_brain_and_language

10_brain_and_language - Language The Brain 1 Structure of...

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Language & The Brain 1. Structure of the brain A. General structures A. General structures Frontal Lobe Temporal Lobe Parietal Lobe Occipital Lobe Corpus Callosum—allows communication between the L & R hemispheres Sylvian Fissure—separates the temporal lobe Motor Cortex-location of motor and muscle control Contralateral control B. Language Centers B. Language Centers Left Hemisphere language dominance Broca’s Area- in frontal lobe on language dominant side Wernicke’s Area—where upper temporal lobe
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joins the parietal lobe on language dominant side. 2. Types of Evidence for language centers of the brain a. Aphasias - Disruption of core language functions as a result of injury to the brain. b. Clinical Procedures- Different medical procedures are used in hospitals to attempt to localize brain injuries Sodium Amytal Injection -- injecting into L or R cartoid artery, which induces paralysis on the opposite site of brain. If there is
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resulting aphasic behavior, this shows the language-dominant hemisphere Computer-assisted tomography (CAT/CT scanning)—used to analyze & map brain function via electronic sensors. -- combined with PET and MRI scans to look at brain behavior during tasks, to pinpoint regions involved & language dominant hemisphere.
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Broca’s Aphasia CT scan Broca’s Aphasia CT scan Broca’s Aphasia CT scan (seen from below, front of head at top, Lang dominant hemisphere on R of picture) Wernicke’s Aphasic , same viewpoint
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c. c.
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