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10 Cards in this Set
- Front
- Back
Aphasia
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a disturbance of language resulting from damage to the brain. Common effect of rupture of blood vessels in brain.
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Broca's area
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- Third frontal gyrus of the cerebral cortex.
- Damage to this area results in disturbance of language output. Caused by damage to left side of brain. |
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Broca's Aphasia
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- Speech slow and labored.
- Articulation crude. - Comprehension of language intact. |
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Wernicke's Aphasia
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- Speech may fluent but little content.
- Comprehension usually lost. - Verbal Paraphasia (substitution of one word for another). - Literal/Phonemic Paraphasia (substitution of incorrect sounds in otherwise correct words). |
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Wernicke's area
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Between Heschl's gyrus (primary receiver of auditory stimuli) and angular gyrus.
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Angular gyrus
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Acts as a way station between auditory and visual regions.
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Wernicke's Model
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Production of language.
(1) Word heard => output (from primary auditory area of cortex) => Wernicke's area. (2) Word spoken, transmitted from Wernicke's => Broca's area => to motor area for speech production. (3) If word spelled => angular gyrus => visual pattern. (4) If word read, output (from primary visual areas) => to angular gyrus => Wernicke's area. |
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Wernicke's area damaged...
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Difficulty comprehending both spoken and written language. Unable to speak, repeat, & write correctly.
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Broca's area damaged...
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Articulation disrupted. Speech would be slow and labored but comprehension intact.
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Wernicke's model benefit
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Used to predict site of brain lesion based on type of language d/o.
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