chapter 2 Flashcards
Recent evidence of cerebral dominance says….
both hemipsheres contribute to language and non-language functions
left hemisphere dominance
approx. 95% of right handed people & 70% of left handed people are left hemisphere dominant
bilateral dominance
approx. 25-30%
right hemisphere dominance
5%
recent view of lang. functions
different neural networks control different functions meaning all structures work together
broad classifications of aphasia
nonfluent, fluent, subcortical, mixed
nonfluent aphasia are characterized by
relatively good auditory comprehension and deficits in lang expression; broca’s, transcortical motor, global
fluent aphasia are characterized by
relatively fluent speech with deficits in auditory comprehension;wernicke’s, conduction, anomic, transcortical sensory
subcortical aphasias are characterized by
borderline aphasias; deficits in both expression and comprehension but severity varies.
mixed aphasias
presence of 2+ aphasias at same time
lesions limited to Broca’s area can have what deficits?
mild deficits in prosody, mild agraphia with occasional anomia; dysarthria
aphemia (broca’s)
unable to articulate words BUT can comprehend and write
Broca’s aphasia is a nonfluent type of aphasia with
deficits in language expression and relatively intact comprehension
transcortical motor aphasia - most commonly affected areas
supplementary motor cortex and areas connecting Broca’s area
transcortical motor aphasia - most commonly affected blood supply
-anterior cerebral artery
-anterior branches of middle cerebral artery
transcortical motor aphasia is a non-fluent type of aphasia with
intact repeitition skills