Motor

Myoclonus

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Myoclonus, Myoclonic Jerk

  • Definitions
  1. Myoclonus (Myoclonic Jerk)
    1. Brief, sudden onset, non-rhythmic, involuntary, shock-like mucle jerking
  • Causes
  1. Myoclonic Epilepsy
  2. Physical Encephalopathy (e.g. Heat Stroke, Electrical Injury)
  3. Viral Encephalopathy (e.g. HSV Encephalitis)
  4. Focal CNS Injury (e.g. Trauma, tumor)
  5. Biological Neurotoxin Exposure
  6. Anoxia
  7. Nocturnal Myoclonus Syndrome (Periodic Limb Movement)
  8. Metabolic causes
    1. Hyponatremia
    2. Hypoglycemia
    3. Hepatic Failure
    4. Renal Failure
    5. Hashimoto's Thyroiditis (Hashimoto's Encephalopathy)
  9. Toxic Causes
    1. Heavy Metal toxicity
    2. Levodopa
  10. Inborn Errors of Metabolism
    1. Glycogen Storage Disease
    2. Carboxylase Deficiency
  11. Degenerative Disorders
    1. Creutzfeldt-Jacob Disease
    2. Huntington Chorea
    3. Parkinson's Disease
    4. Alzheimer's Disease