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The Human Phenotype Ontology (HPO) is downloaded weekly from The file downloaded is considered the "last stable build" available for the ontology. For more about the HPO, view their website at

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Accession:HP:0001347 term browser browse the term
Definition:Hyperreflexia is the presence of hyperactive stretch reflexes of the muscles.
Comment:Reflexes are graded according to the following scale: 0=absent; 1=present but diminished; 2=normoactive; 3=exaggerated; and 4=clonus. Clonus is always abnormal, and a grade 3 reflex may be abnormal if it is asymmetric or if it was previously grade 2 or less.
Synonyms:exact_synonym: Increased deep tendon reflexes;   Increased reflexes
 alt_id: HP:0001282;   HP:0006820;   HP:0007184;   HP:0007318
 xref: MESH:D012021;   SNOMEDCT_US:86854008;   UMLS:C0151889

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  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the nervous system 0
        Abnormal nervous system physiology 0
          Abnormality of movement 0
            Abnormal reflex 0
              Hyperreflexia 0
                Brisk reflexes 0
                Clonus + 0
                Generalized hyperreflexia 0
                Hyperactive deep tendon reflexes 0
                Jaw hyperreflexia 0
                Lower limb hyperreflexia + 0
                Proximal hyperreflexia + 0
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