Lecture 15 Flashcards
Aphasia is an impairment due to acquired and recent damage to the ___________.
Central Nervous System
Aphasia is an impairment of the ability to _______ and ______ language.
comprehend and formulate
Aphasia is a multimodality disorder represented by a variety of impairments in what 4 things?
auditory comprehension
reading
oral expressive language
writing
The disrupted language may be influenced by ________ or _______.
physiological inefficiency or impaired cognition
*can’t be explained by dementia, sensory loss, or motor dysfunction
Aphasia is usually due to interrupted blood flow. T or F?
True;
interrupted blood blow causes cell death and results in necrotic tissue which eventially liquifies and is removed by astroglial action.
A cerebrovascular accident (stroke) can be caused by?
occlusive mechanisms (such as arteriosclerosis, thrombus, or embolism) or hemorrahage, .
the thickening or hardening of the arterial wall is ….
arteriosclerosis
accumulation of blood platelets on the arterial wall is…
thrombus
the blockage of an artery by an arterial embolus…
embolism
rupture of a vessel in the brain…
hemorrhage
dilated blood vessel, bursts at the weak point in the wall…
aneurysm
an abnormal connection bewteen veins and arteries that can lead to an aneurysm…
arteriovenous malformation (AVM)
A Neoplasm (tumor) can be either _____ or _____.
How does it affect speech, language and behaviors?
benign or malignant; it affects by pressing on structures in the brain or invading and damaging these structures
What are the 2 kinds of classification of aphasia?
expressive vs receptive
fluent vs nonfluent
Nonfluent, reduced verbal output, increased effort speaking, dysprosody, and agrammatism is what kind of aphasia?
Broca’s aphasia; often co-occurs with apraxia of speech and has right sided limb weakness due to involvement of motor cortex
Lesions that cause Broca’s aphasia occur in…
the frontal operculum extending to subcortical white matter and adjacent cortical regions of the frontal lobe
Fluent aphasia, speech is frequently paraphasic, characterized by significant difficulty with auditory comprehension, usually no significant motor involvement due to the posterior location of the lesion is what kind of aphasia?
Wernicke’s Aphasia
Lesions that cause Wernicke’s aphasia occur in….
posterior superior temporal gyrys and damage to supramarginal and angular gyrus
Fluent aphasia, disproportionaltely poor repetion given fluency of speech, frequent phonemic paraphasias, auditory comprehension is relatively good is what kind of aphasia?
Conduction Aphasia
Severe expressive and receptive aphasia, nonfluent, speech output may be limited to a few words or a recurrent word or nonword spoken w/ appropriate inflection is what kind of aphasia?
Global Aphasia
Transcotical aphasias: lesions are just outside or athe border of the ___________ and distribution of the middle cerebral artery.
Perisylvian langyage zones
What are the three kinds of transcortical aphasias?
transcortical motor, transcortical sensory and mixed transcortical aphasia.
All transcortical moto aphasias are characterized by very good ________.
repetition
Relatively good receptive and expressive abilities, word finding difficulty is main symtpom, fluent aphasia, lesions commonly in angular gyrus is what kind of aphasia?
Anomic Aphasia