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Psychogenic parkinsonism

A E Lang1, W C Koller, S Fahn

  • 1Department of Medicine (Neurology), University of Toronto, Ontario.

Archives of Neurology
|August 1, 1995
PubMed
Summary
This summary is machine-generated.

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Psychogenic parkinsonism, a rare condition, presents with variable tremor, rigidity, and slowness. It is a diagnosis of exclusion, requiring experienced clinicians to differentiate from organic parkinsonian disorders.

Area of Science:

  • Neurology
  • Psychiatry

Background:

  • Parkinsonism secondary to psychiatric disorders is poorly understood.
  • This study aimed to characterize psychogenic parkinsonism.

Observation:

  • Retrospective chart reviews of 14 patients diagnosed with psychogenic parkinsonism.
  • Patients presented with unique tremor, rigidity, and bradykinesia features.
  • Inconsistent symptoms, functional weakness, and nonorganic sensory disturbances were noted.

Findings:

  • Tremor varied in frequency and rhythm, often entrainable or distractible.
  • Rigidity showed voluntary resistance and synkinetic movements.
  • Slowness of movement lacked typical bradykinetic decrementing amplitude.
  • Abnormalities in gait and posture were often bizarre and inconsistent.

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  • Spontaneous remissions and responses to placebo or psychotherapy were observed.

    • Implications:

    • Psychogenic parkinsonism is a rare diagnosis of exclusion.
    • Experienced movement disorder specialists are crucial for accurate diagnosis.
    • Distinguishing psychogenic parkinsonism from organic forms is essential for appropriate management.