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Clinical Manifestations.

Gaia Chiara Santi1, Eleonora Catricalà2, Stephanie Kwan3

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Summary
This summary is machine-generated.

This study reveals consistent semantic profiles in Primary Progressive Aphasia (PPA) across English, Chinese, and Italian speakers. Language-specific features significantly impact PPA presentation, necessitating tailored diagnostic criteria.

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Area of Science:

  • Neurolinguistics
  • Speech and Language Pathology
  • Computational Linguistics

Background:

  • Primary Progressive Aphasia (PPA) research predominantly features English-speaking cohorts.
  • The influence of language typology on PPA's clinical manifestation is not well understood.
  • Cross-linguistic PPA profiles require investigation using data-driven methods.

Purpose of the Study:

  • To examine speech and language profiles in English, Chinese, and Italian PPA patients.
  • To identify cross-linguistic similarities and differences in PPA manifestations.
  • To explore the impact of language typology on PPA phenotypes.

Main Methods:

  • A data-driven approach using Community Detection Analysis (CDA) on speech samples from 90 PPA patients (30 per language).
  • CLAN analysis characterized phonetic-phonological, lexico-semantic, morpho-syntactic, and discourse-pragmatic domains.
  • Profiles were compared across English, Chinese, and Italian cohorts.

Main Results:

  • A consistent semantic cluster was observed across all languages.
  • Non-fluent variant PPA (nfvPPA) and logopenic variant PPA (lvPPA) showed significant heterogeneity.
  • Language-specific features influenced PPA presentation, e.g., tone errors in Chinese, morphological errors in Italian.

Conclusions:

  • Cross-linguistic PPA research is crucial for understanding disease heterogeneity.
  • Language-specific features play a key role in PPA clinical characterization.
  • Existing diagnostic criteria may need adaptation for non-English languages.