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Related Experiment Video

Updated: Feb 6, 2026

Utilizing Repetitive Transcranial Magnetic Stimulation to Improve Language Function in Stroke Patients with Chronic Non-fluent Aphasia
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Linguistic Aspects of Primary Progressive Aphasia.

Murray Grossman1

  • 1Penn Frontotemporal Degeneration Center and Department of Neurology, University of Pennsylvania, Philadelphia, Pennsylvania 19104.

Annual Review of Linguistics
|August 17, 2018
PubMed
Summary

Primary progressive aphasia (PPA) involves language decline from neurodegenerative diseases. Recognizing PPA variants aids in understanding specific pathologies and the brain

Area of Science:

  • Neurolinguistics
  • Neurodegenerative Diseases
  • Cognitive Science

Background:

  • Primary progressive aphasia (PPA) is a group of neurodegenerative disorders characterized by progressive language decline.
  • PPA variants serve as clinical markers for underlying pathologies like frontotemporal degeneration and Alzheimer's disease.
  • Understanding PPA offers unique insights into language mechanisms and their neural underpinnings, complementing stroke-related aphasia studies.

Purpose of the Study:

  • To review the linguistic aspects of different PPA variants.
  • To explore how PPA syndromes inform our understanding of language processing and neural representation.
  • To connect specific PPA variants to distinct language components and associated pathologies.

Main Methods:

  • Literature review focusing on linguistic features of PPA variants.
Keywords:
agrammaticdiscoursefrontotemporal dementiaprimary progressive aphasiasemantic

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  • Analysis of semantic, grammatical, short-term memory, and discourse components in relation to PPA subtypes.
  • Discussion of the neural correlates of language in the context of PPA.

    • Main Results:

    • Semantic variant PPA is linked to the representation of word meaning.
    • Nonfluent/agrammatic variant PPA relates to grammatical comprehension and expression.
    • Logopenic variant PPA highlights the role of short-term memory in language.
    • Behavioral variant frontotemporal dementia involves discourse deficits.

    Conclusions:

    • Linguistic analysis of PPA variants provides critical information about language function and its neural basis.
    • Each PPA variant offers a distinct window into specific aspects of the language system.
    • PPA research complements traditional aphasia studies by focusing on neurodegenerative origins of language disorders.