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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:Atonic seizure
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Accession:HP:0010819 term browser browse the term
Definition:Atonic seizure is a type of motor seizure characterized by a sudden loss or diminution of muscle tone without apparent preceding myoclonic or tonic event lasting about 1 to 2 seconds, involving head, trunk, jaw, or limb musculature.
Comment:This term describes the initial semiology of the seizure without specifying whether the onset is focal or generalized. Thus it can be used for coding atonic seizures when the onset is not known.
Synonyms:exact_synonym: Astatic seizure;   Atonic seizures;   Hypotonic seizure;   astatic seizures;   drop attacks;   drop seizures
 related_synonym: Hypotonic seizures;   Sudden loss of muscle tone
 alt_id: HP:0002124
 xref: SNOMEDCT_US:189198006;   SNOMEDCT_US:42365007;   UMLS:C0270846;   UMLS:C1836509


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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the nervous system 0
        Abnormal nervous system physiology 0
          Seizure 0
            Motor seizure 0
              Atonic seizure 0
                Focal atonic seizure + 0
                Generalized atonic seizure 0
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