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Updated: May 31, 2025

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Functional movement disorders in dopa-responsive dystonia.

Feline Hamami1, Jannik Prasuhn2, Leon-Claas van Well3

  • 1Institute of Systems Motor Science, University Medical Center Schleswig-Holstein, University of Lübeck, Lübeck, Germany; Center for Brain, Behavior, and Metabolism, University of Lübeck, Lübeck, Germany.

Parkinsonism & Related Disorders
|January 23, 2025
PubMed
Summary
This summary is machine-generated.

Functional neurological movement disorders frequently occur alongside dopa-responsive dystonia, significantly increasing patient disability. Early diagnosis is crucial for appropriate treatment, avoiding ineffective L-Dopa increases and guiding physiotherapy.

Keywords:
DRDDopa-responsive dystoniaFunctional movement disordersFunctional neurological disordersGCH1

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Area of Science:

  • Neurology
  • Movement Disorders
  • Neuroscience

Background:

  • Functional neurological movement disorders (FNMDs) are prevalent and debilitating.
  • Understanding the overlap between FNMDs and other movement disorders is limited.

Purpose of the Study:

  • To determine the frequency and characteristics of FNMDs in patients with GCH1-positive dopa-responsive dystonia (DRD).

Main Methods:

  • A cohort of 21 DRD patients underwent detailed motor examinations.
  • Patients completed self-questionnaires assessing non-motor symptoms.

Main Results:

  • 33% of DRD patients had comorbid FNMDs, including gait and balance disorders, and weakness.
  • These functional symptoms dominated the clinical picture, leading to significant disability and immobilization.
  • Functional symptoms appeared years after DRD onset, were L-Dopa unresponsive, and resulted in unnecessary treatments.

Conclusions:

  • FNMDs are common in DRD patients, significantly impacting disability.
  • Accurate diagnosis is vital to avoid inappropriate L-Dopa escalation and guide tailored physiotherapy.
  • Treatment should integrate physiotherapy focused on automatic movement, alongside psychoeducation and psychotherapy.