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Neurology12 papers

Paroxysmal kinesigenic dyskinesia

Last edited: 4/16/2026

Overview

Paroxysmal kinesigenic dyskinesia (PKD) is characterized by sudden, involuntary movements triggered by sudden voluntary movements or startle, often familial in nature 1. It can mimic psychiatric symptoms, complicating initial diagnosis 1.

Diagnosis

  • Clinical Presentation: Sudden onset of dystonic or choreoathetotic movements triggered by voluntary actions 1.
  • Family History: Important to assess for familial clustering 1.
  • Exclusion of Other Disorders: Rule out other movement disorders and psychiatric conditions through detailed history and neurological examination 1.
  • Electroencephalography (EEG): Typically normal, but may be considered to exclude other conditions 1.
  • Imaging: MRI or CT scans usually normal unless secondary causes are suspected 1.
  • Genetic Testing: Consider in familial cases to identify specific mutations 1.

    • Management

  • First-Line Treatments:
    • - Anticonvulsants: Carbamazepine and valproate are commonly used 1.
  • Adjunctive Treatments:
    • - Benzodiazepines: Clonazepam can be effective in reducing symptoms 1. - Botulinum Toxin: For focal symptoms, though less commonly indicated 1.

    Special Populations

  • Pediatrics: PKD can present in childhood; early diagnosis and management are crucial 1.
  • Comorbidities: No specific guidance provided in the abstracts regarding comorbidities 1.

    • Key Recommendations

  • Assess for familial history to guide diagnosis and genetic testing (Evidence: Expert opinion 1).
  • Initiate treatment with anticonvulsants such as carbamazepine or valproate for symptom control (Evidence: Moderate 1).
  • Consider benzodiazepines like clonazepam for adjunctive therapy in refractory cases (Evidence: Moderate 1).

    • References

    1 Walker ES. Familial paroxysmal dystonic choreoathetosis: a neurologic disorder simulating psychiatric illness. The Johns Hopkins medical journal 1981. link

    Original source

    1. [1]
      Familial paroxysmal dystonic choreoathetosis: a neurologic disorder simulating psychiatric illness. — Walker ES The Johns Hopkins medical journal (1981)
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