Disease or Syndrome
clonic seizures
clon·ic sei·zures
Definitions related to clonic seizures:
  • A clonic seizure is a type of motor seizure characterized by sustained rhythmic jerking, that is regularly repetitive.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • (clonic convulsion) A convulsion marked by alternating contracting and relaxing of the muscles.
    NCI
    U.S. National Cancer Institute, 2021
  • (clonic convulsion) An involuntary, violent muscular contraction or spasm in which the muscles alternately contract and relax. Characteristic phase in grand mal epileptic seizure.
    Sadock's Comprehensive Glossary of Psychiatry and Psychology
    BJ Sadock Titles Press, 2012
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.