Anatomy of @entity73 in XXXX .

@entity1 @entity303 @entity73 @entity75 @entity2026 @entity194 @entity35869
@entity35869 ( @entity35869 ) is a clinical @entity303 characterized by progressive decline in language function but relative sparing of other cognitive domains. There are three recognized @entity35869 variants: agrammatic, semantic, and logopenic. Although each @entity35869 subtype is characterized by the nature of the principal deficit, individual @entity1 frequently display @entity73 in additional language domains. The present study investigated the distribution of @entity194 related to performance in specific language domains (i.e., grammatical processing, semantic processing, fluency, and sentence repetition) across @entity35869 variants to better understand the anatomical substrates of language. Results showed regionally specific relationships, primarily in the left hemisphere, between @entity194 and impairments in language performance. Most notable was the neuroanatomical distinction between fluency and grammatical processing. Poor fluency was associated with regions dorsal to the traditional boundaries of Broca's area in the inferior frontal sulcus and the posterior middle frontal gyrus, whereas grammatical processing was associated with more widespread @entity194 , including the @entity75 . Repetition performance was correlated with @entity194 in the posterior superior temporal gyrus. The correlation of @entity194 with semantic processing impairment was localized to the anterior temporal poles. Atrophy patterns were more closely correlated with domain-specific performance than with subtype. These results show that @entity35869 reflects a selective disruption of the language network as a whole, with no rigid boundaries between subtypes. Further, these @entity194 patterns reveal anatomical correlates of language that could not have been surmised in @entity1 with @entity2026 resulting from @entity75 .
