Aphasia and communication disorders Flashcards
Aphasia
impairment in language processing resulting from brain injury or disease
Symptoms of aphasia
difficulty with expressive (e.g. speaking) and/or receptive (e.g. understanding) communication, reading, writing
Misconceptions of aphasia
vocabulary loss, dysarthria (slurring), vocal chord damage, hearing problem
Characteristics of Broca’s aphasia
non-fluent, effortful and halting speech, compensatory behaviors (e.g. gestures, circumlocution, generic word substitutions), preserved comprehension
Circumlocution
describing things instead of identifying them
Characteristics of Wernicke’s aphasia
fluent but nonsensical (e.g. uses neologisms or made-up words) impaired comprehension, poor awareness of deficits
4 kinds of speech errors in aphasia
anomic errors, phonemic and semantic paraphasias, neologisms
Anomic errors
failure to name or retrieve names, common and proper nouns
Phonemic paraphasias
a person says a word that sounds like the target word but is unrelated; more common in Wernicke’s
Semantic paraphasias
a person says a word that is related to the target word but doesn’t sound like it; more common in Wernicke’s
Speech apraxia
disruption in the phasing of movements involved in speech often accompanied by Broca’s aphasia
Characteristics of speech apraxia
slow speech rate, segmentation of syllables, trial-and-error articulatory movements, increased difficulty with increased length and complexity of utterances
Aprosodia
inability to express and/or understand the emotive content of spoken language (e.g. difficulty with sarcasm)
What is aprosodia associated with?
right frontoparietal (inability to express) or right temporoparietal (inability to comprehend)
Possible causes of aprosodia
stroke, alzheimer’s, TBI, schizophrenia
Alexia or acquired dyslexia
difficulty reading that is usually accompanied by difficulty writing (agrapia) and aphasia with errors depending on lesion location
4 types of alexia
alexia without agraphia, surface alexia, phonological alexia, deep alexia
Alexia without agraphia
slow letter-by-letter reading but no agraphia
Lesion resulting in alexia without agraphia
left primary visual cortex and the splenium of the corpus callosum
Surface alexia
difficulty reading and spelling irregular words
Lesion resulting in surface alexia
left temporoparietal (angular gyrus)
Phonological alexia
difficulty sounding out words
Lesion resulting in phonological alexia
left temporoparietal (angular gyrus)
Deep alexia
semantic paralexic errors when reading
Lesion resulting in deep alexia
large left hemisphere lesions
Treatments for aphasia
speech-language therapy targeting functional communication; constraint-induced aphasia therapy; melodic intonation therapy; technology-facilitated; aphasia-friendly documents and signs (e.g. pictures)