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Foreign Accent and Forensic Speaker Identification in Voice Lineups: The Influence of Acoustic Features Based on Prosody
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Understanding foreign accent syndrome.

Laura McWhirter1, Nick Miller2, Catriona Campbell3

  • 1Centre for Clinical Brain Sciences, University of Edinburgh, Edinburgh, UK laura.mcwhirter@ed.ac.uk.

Journal of Neurology, Neurosurgery, and Psychiatry
|March 4, 2019
PubMed
Summary
This summary is machine-generated.

Foreign accent syndrome (FAS) may often be a functional neurological disorder, not just structural damage. This study found functional features in most self-reported FAS cases, suggesting a broader diagnostic view.

Keywords:
conversion disorderfunctional neurological disordermigrainespeechstroke

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Area of Science:

  • Neurology
  • Speech-Language Pathology

Background:

  • Foreign accent syndrome (FAS) is typically linked to structural neurological damage.
  • However, FAS may sometimes manifest as a functional neurological disorder.

Purpose of the Study:

  • To assess the prevalence and diagnostic utility of functional FAS features.
  • To investigate functional characteristics in individuals reporting FAS.

Main Methods:

  • An observational study involving individuals self-reporting FAS.
  • Recruitment via online support forums and professional networks.
  • Online surveys and speech sample analysis in a subgroup.

Main Results:

  • 49 respondents reported FAS, with common triggers including migraine and stroke.
  • High comorbidity with functional disorders like migraine and irritable bowel syndrome was noted.
  • Functional FAS features were present in all groups, and speech analysis correctly categorized etiology in 85% of cases.

Conclusions:

  • This case series suggests chronic FAS may represent a functional neurological disorder in some individuals.
  • High comorbidity and symptom variability support a functional basis, even with co-existing structural lesions.
  • Findings indicate a need to consider functional neurological disorder in FAS diagnosis.