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22 Cards in this Set
- Front
- Back
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most common cause of Broca's aphasia
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left middle cerebral artery superior division infarct
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most common cause of Wernicke's aphasia
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left middle cerebral artery inferior division infarct
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prosody (intonation) is lacking in which aphasia
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Broca's
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which structure allows communication b/w Broca's and Wernicke's
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arcuate fasciculus
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anosognosia
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unaware of deficit
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dysarthria and hemiparesis occurs in
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Broca's aphasia
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contralateral visual field cut and anosognosia occur in
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Wernicke's
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common cause of global aphasia
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large left MCA infarcts
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common cause of conduction aphasia
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lesion in the peri-Sylvian area that interrupt the arcuate fasciculus
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common cause of transcortical aphasias
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watershed infarcts, which spare Broca's, Wernicke's, and their interconnections but damage other language areas in the frontal or temporoparietal cortices
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common cause of transcortical motor aphasia
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ACA-MCA watershed infarct
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common cause of transcortical sensory aphasia
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MCA-PCA watershed infarct
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cause of agraphia without aphasia
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lesion of the dominant inferior parietal lobe
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cause of alexia without agraphia
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lesion in the dominant occipital cortex extending to the posterior corpus callosum; usually a PCA infarct
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cause of alexia with agraphia
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lesion in the dominant inferior parietal lobe; usually angular gyrus
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tetrad of Gerstmann's Syndrome
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agraphia
right-left confusion finger agnosia acalculia |
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what is apraxia?
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inability to carry out an action in response to verbal command caused by an inability to formulate the correct movement sequence
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what is aphemia?
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severe apraxia of the speech articulatory apparatus, w/o a language disturbance; usually caused by a lesion of the dominant frontal operculum restricted to Broca's area; patients have effortful, poorly articulated speech (foreign accent syndrome)
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what is the difference b/w aphemia and Broca's aphasia?
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patients with aphemia have normal written language
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where would a lesion cause cortical deafness
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bilateral lesions of the primary auditory cortex in Heschl's gyrus
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where would a lesion cause pure word deafness
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infarct in the auditory area of the dominant hemisphere that extends to the subcortical white matter
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what is cortical deafness?
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cannot identify nonverbal stimuli such as a telephone ringing or a dog barking
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