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HUMAN PHENOTYPE - ANNOTATIONS

The Human Phenotype Ontology (HPO) is downloaded weekly from http://compbio.charite.de/hudson/job/hpo/lastStableBuild/artifact/ontology/release/hp.obo. The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at http://www.human-phenotype-ontology.org/.

Term:Myoclonus
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Accession:HP:0001336 term browser browse the term
Definition:Very brief, involuntary random muscular contractions occurring at rest, in response to sensory stimuli, or accompanying voluntary movements.
Comment:Myoclonus may be synchronous (several muscle contracting simultaneously), spreading (several muscles contracting in sequence), or asynchronous (several muscles contracting with varying and unpredictable relative timing). Myoclonus is characterized by sudden unidirectional movement due to muscle contraction (positive myoclonus) or due to sudden brief muscle relaxation (negative myoclonus). Electrophysiological tests are very helpful in determining whether myoclonus is cortical, subcortical or spinal.
Synonyms:exact_synonym: Myoclonic jerks
 broad_synonym: Jerking
 related_synonym: Involuntary jerking movements
 alt_id: HP:0002535;   HP:0007087
 xref: MESH:D009207;   SNOMEDCT_US:127324008;   SNOMEDCT_US:17450006;   UMLS:C0027066;   UMLS:C1854302



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Term paths to the root
Path 1
Term Annotations click to browse term
  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the nervous system 0
        Abnormal nervous system physiology 0
          Abnormal central motor function 0
            Myoclonus 0
              Action myoclonus 0
              Chin myoclonus 0
              Cortical myoclonus + 0
              Erratic myoclonus 0
              Eyelid myoclonus 0
              Limb myoclonus 0
              Morning myoclonic jerks 0
              Myoclonic spasms + 0
              Palatal tremor 0
              Polyminimyoclonus 0
              Sleep myoclonus 0
              Spinal myoclonus 0
Path 2
Term Annotations click to browse term
  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the nervous system 0
        Abnormal nervous system physiology 0
          Abnormal central motor function 0
            Involuntary movements 0
              Myoclonus 0
                Action myoclonus 0
                Chin myoclonus 0
                Cortical myoclonus + 0
                Erratic myoclonus 0
                Eyelid myoclonus 0
                Limb myoclonus 0
                Morning myoclonic jerks 0
                Myoclonic spasms + 0
                Palatal tremor 0
                Polyminimyoclonus 0
                Sleep myoclonus 0
                Spinal myoclonus 0
paths to the root