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Predisposing Risk Factors for Functional Limb Weakness: A Case-Control Study.

Jon Stone1, Charles Warlow1, Ian Deary1

  • 1The Centre for Clinical Brain Sciences, University of Edinburgh, Royal Infirmary, Edinburgh, United Kingdom (Stone, Warlow); the Centre for Cognitive Ageing and Cognitive Epidemiology, University of Edinburgh, United Kingdom (Deary); the Department of Psychological Medicine Research, University of Oxford, United Kingdom (Sharpe).

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|August 31, 2019
PubMed
Summary
This summary is machine-generated.

Adverse childhood experiences and medical comorbidities are risk factors for functional limb weakness. Personality traits and symptom modeling showed less robust evidence in this functional neurological disorder study.

Keywords:
Conversion Disorder, Functional limb weakness, Case-Control Study, PsychogenicFunctional Neurological Disorder

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Area of Science:

  • Neurology
  • Psychiatry
  • Clinical Psychology

Background:

  • Functional limb weakness is a common symptom in functional neurological disorder.
  • Controlled studies on predisposing factors for functional limb weakness are limited.

Purpose of the Study:

  • To investigate potential predisposing factors for functional limb weakness.
  • To assess the specificity of these factors in functional neurological disorder.

Main Methods:

  • Prospective case-control study comparing 107 patients with functional limb weakness to 46 patients with neurological weakness and 39 healthy controls.
  • Assessed childhood trauma (Childhood Trauma Questionnaire [CTQ]), personality traits (NEO Five-Factor Inventory), medical comorbidity, and symptom modeling exposure via clinical interview and questionnaires.

Main Results:

  • Functional limb weakness group reported higher rates of childhood sexual and physical abuse (CTQ moderate or above) compared to controls.
  • Increased neuroticism and decreased openness were observed in the functional limb weakness group.
  • Higher prevalence of medical comorbidities like appendectomy, irritable bowel syndrome, and chronic back pain in the functional limb weakness group.

Conclusions:

  • Medical comorbidity and adverse childhood experiences are identified as risk factors for functional limb weakness.
  • The evidence for personality traits and symptom modeling exposure as significant factors is less conclusive.