#disability_of_walking  a disability that interferes with or prevents walking
  supertype:  #disability__disablement__handicap__impairment  the condition of being unable to perform as a consequence of physical or mental unfitness; "reading disability"; "hearing impairment"
  subtype:  #abasia  inability to walk
     subtype:  #abasia_trepidans  abasia due to trembling of the legs
     subtype:  #atactic_abasia__atacticabasia__ataxic_abasia  abasia due to ataxia of the legs
     subtype:  #choreic_abasia__choreicabasia  abasia related to abnormal movements of the legs
     subtype:  #paralytic_abasia__paralyticabasia  abasia related to paralysis of the leg muscles
     subtype:  #paroxysmal_trepidant_abasia  abasia related to spasticity of the legs
     subtype:  #spastic_abasia__spasticabasia  abasia due to spastic contractions of the leg muscles
  subtype:  #lameness__limping__gimp__gimpiness__gimpines__gamenes__claudication  disability of walking due to crippling of the legs or feet
     subtype:  #intermittent_claudication  lameness due to pain in leg muscles because the blood supply is inadequate; pain subsides with rest

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