Disease or Syndrome
myotonic disorder
Subclass of:
Myopathy
Definitions related to myotonic disorders:
  • An inherited or acquired, localized or generalized disorder affecting the muscles. It may be associated with abnormalities in the chloride or sodium channels of the muscles. It is characterized by delayed muscle relaxation following stimulation or contraction. Representative examples include myotonia congenita and myotonic dystrophy.
    NCI
    U.S. National Cancer Institute, 2021
  • Diseases characterized by MYOTONIA, which may be inherited or acquired. Myotonia may be restricted to certain muscles (e.g., intrinsic hand muscles) or occur as a generalized condition.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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