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10 Cards in this Set

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  • Back
Aphasia
a disturbance of language resulting from damage to the brain. Common effect of rupture of blood vessels in brain.
Broca's area
- 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.
Broca's Aphasia
- Speech slow and labored.
- Articulation crude.
- Comprehension of language intact.
Wernicke's Aphasia
- 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).
Wernicke's area
Between Heschl's gyrus (primary receiver of auditory stimuli) and angular gyrus.
Angular gyrus
Acts as a way station between auditory and visual regions.
Wernicke's Model
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.
Wernicke's area damaged...
Difficulty comprehending both spoken and written language. Unable to speak, repeat, & write correctly.
Broca's area damaged...
Articulation disrupted. Speech would be slow and labored but comprehension intact.
Wernicke's model benefit
Used to predict site of brain lesion based on type of language d/o.