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

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 |

BA MA (Oxon) MBChB (Edin) FACEM FFSEM. Associate Professor Curtin Medical School, Curtin University. Emergency physician, 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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