Varieties of semantic 'access' deficit in Wernicke's aphasia and semantic aphasia.

ABSTRACT: Comprehension deficits are common in stroke aphasia, including in cases with (i) semantic aphasia, characterized by poor executive control of semantic processing across verbal and non-verbal modalities; and (ii) Wernicke's aphasia, associated with poor auditory-verbal comprehension and repetition, plus fluent speech with jargon. However, the varieties of these comprehension problems, and their underlying causes, are not well understood. Both patient groups exhibit some type of semantic 'access' deficit, as opposed to the 'storage' deficits observed in semantic dementia. Nevertheless, existing descriptions suggest that these patients might have different varieties of 'access' impairment-related to difficulty resolving competition (in semantic aphasia) versus initial activation of concepts f

SUBMITTER: Thompson HE 

PROVIDER: S-EPMC4655340 | biostudies-literature | 2015 Dec

REPOSITORIES: biostudies-literature