Neuropsychological Profiles Differ among the Three Variants of Primary Progressive Aphasia

Alissa M. Butts, Mary M. Machulda, Joseph R. Duffy, Edythe A. Strand, Jennifer L. Whitwell, Keith A. Josephs

Research output: Contribution to journalArticlepeer-review

28 Scopus citations

Abstract

The objective of this study was to describe the neuropsychological profiles of the three variants of primary progressive aphasia (PPA). Based on a comprehensive speech and language evaluation, 91 subjects were classified as logopenic (lvPPA=51), semantic (svPPA=13), or agrammatic (agPPA=27). All subjects completed a separate neuropsychological evaluation assessing verbal and visual memory, processing speed, executive function, and visuospatial function. The groups did not differ on demographic variables or on measures of disease duration or aphasia severity. There were group differences on aspects of learning and memory, as well as aspects of executive and visuospatial functions, primarily with the lvPPA group performing lower than the agPPA and svPPA groups. The agPPA group showed subtle deficits consistent with frontal lobe impairment, whereas neurocognitive weaknesses in the svPPA group were restricted to temporal lobe functions. The pattern of neurocognitive dysfunction in lvPPA suggests disease involvement of frontal lobe functions in addition to temporoparietal functions. These neurocognitive findings emphasize the value of a comprehensive neuropsychological evaluation of individuals who present with primary language disturbance, given the pattern of cognitive deficits may provide additive information for differentiating these clinical syndromes.

Original languageEnglish (US)
Pages (from-to)429-435
Number of pages7
JournalJournal of the International Neuropsychological Society
Volume21
Issue number6
DOIs
StatePublished - Jul 2 2015

Keywords

  • Agrammatic
  • Cognition
  • Logopenic
  • Neuropsychology
  • Primary progressive aphasia
  • Semantic

ASJC Scopus subject areas

  • Neuroscience(all)
  • Clinical Psychology
  • Clinical Neurology
  • Psychiatry and Mental health

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