J. Richard Ewald

Ernst Julius Richard Ewald (1855 – 1921) was a German physiologist.


  • Born 14 February 1855 in Berlin
  • Died 22 July 1921

Medical Eponyms
  1. A stimulation of the semicircular canal causes a movement of the eyes in the plane of the stimulated canal
  2. In the horizontal semicircular canals, an ampullopetal endolymph movement cases a greater stimulation than an ampullofugal one.
  3. In the vertical semicircular canals, the reverse is true.

Key Medical Contributions

Major Publications




  • Jongkees LB. J. R. Ewald. Arch Otolaryngol. 1966;83(6):615-619.
  • Hain TC. Ewald JR. Dizziness and Balance 2020

Eponymous terms


the person behind the name

Emergency physician and medical illustrator with no functioning smartphone or understanding of Twittles, Bookface or Instagran - greatly restricting his ability to do anything useful | @ercleve | LinkedIn |

Associate Professor Curtin Medical School, Curtin University. Emergency physician MA (Oxon) MBChB (Edin) FACEM FFSEM Sir Charles Gairdner Hospital.  Passion for rugby; medical history; medical education; and asynchronous learning #FOAMed evangelist. Co-founder and CTO of Life in the Fast lane | Eponyms | Books | Twitter |

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