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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:0001284 term browser browse the term
Definition:Absence of neurologic reflexes such as the knee-jerk reaction.
Comment:The strectch reflexes (also called deep tendon relfexes) include the knee-jerk reflex (patellar reflex, the biceps reflex, the triceps reflex, and the ankle jerk reflex or Achilles tendon reflex).
Synonyms:exact_synonym: Absent deep tendon reflexes;   Absent tendon reflexes;   Loss of deep tendon reflexes
 broad_synonym: Absent reflexes
 alt_id: HP:0001314
 xref: MSH:D012021;   SNOMEDCT_US:349006;   SNOMEDCT_US:37280007;   UMLS:C0234146;   UMLS:C0241772;   UMLS:C0278124

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Term Annotations click to browse term
  Human phenotype 0
    Phenotypic abnormality 0
      Abnormality of the nervous system 0
        Abnormal nervous system physiology 0
          Abnormality of movement 0
            Abnormal reflex 0
              Reduced tendon reflexes 0
                Areflexia 0
                  Areflexia of lower limbs + 0
                  Areflexia of upper limbs + 0
                  Hemiareflexia 0
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