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neurolinguistics
classification of aphasia
19
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Undergraduate 3
04/18/2007

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Term
agrammatism
Definition
-defective production of synatx and grammatical morphology
-tense, number and gender agreement maybe violated
-this is a symptom of many broca's aphasics, also seen in other types of aphasia
Term
wernicke's aphasia
Definition
-fluent but semantically empty speech (jargon)
-phonemic substitutions
-newly created words(neologisms)
-auditory comprehension is often impared
Term
Conduction Aphasia
Definition
-inablility to repeat inpt
-speak fluently, preserved comprehension
-caused by damage to nerve that connects wernicke's and broca's area
Term
Trascortical aphasias:
Definition
-repitition is spared
-either comprehension or production is impaired
-link between wernicke's and brocas area is preserved
-there are 3 types of transcortical aphasias
Term
transcortical motor aphasia
Definition
-spontaneous production is comprimised
-lesions located deep in the frontal lobe and anterior or superior to broca's area
-these symptoms are not as evident during repition (this is the main difference between this and broca's aphasia)
Term
transcortical sensory aphasia
Definition
-similar to wernicke's aphasia
-fluent but incoherent speech
-repitition still good
Term
mixed transcortical aphasia
Definition
-severely limited spontaneous speech
-very poor auditory comprehension
-preserved repitition ability
Term
anomia
Definition
inability to retrieve object names
-often a result of damage to angular gyrus at the junction of the temporal, parietal and occipital lobes
Term
paraphasia
Definition
inapporpriate substitution that can happen at a variety of language levels.
Term
pure word deafness
Definition
-patient can hear but cannot comprehend or repeat auditorally-presented words.
-can usually speak fluently
-injury to heschl's gyrus
Term
pure alexia
Definition
cannot read although they can speak and understand spoken language
Term
pure agraphia
Definition
cannot write
Term
apraxia
Definition
disorder of the exectuion of learned movement that often co-occurs with various aphasias.
Term
Aphasia
Definition
-disturbance of formulating and/or comprehending language
-result of damage or disease of CNS
-can also affect reading, writing, and sign language of the deaf.
Term
Global Aphasia
Definition
-totally unable to communicate using language.
-production limited to a few words or syllables
-comprehension is minimal
-extensive left-hemisphere damage
Term
Short term Global Aphasia
Definition
-seen immediately following stroke or injury
-may resolve into less severe syndrome or complete recovery in a matter of weeks or months
-language centres remained intact be were not accessible to the patients due to the severe nature of their initial trauma
Term
Fluent speech
Definition
-normal rate, good prosody and articulation with normal-length sentences
Term
Non-fluent speech
Definition
-hesitant and effortful with reduced utterance length, prosody and articulation maybe be abnormal.
Term
Broca’s Aphasia
Definition
-non-fluent speech
-determiners, prepositions, inflectional affixes often left out
-comprehension is normally spared
-reading, writing poor
-difficulty comprehending complex syntactic structures
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