J. Richard Ewald

Biography

• 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

• Ewald JR. Physiologische untersuchungen ueber das endorgan des nervus octavus. 1892

Controversies

References

Biography

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

Eponymous terms

• Hallpike CS. On the case for repeal of Ewald’s second Law. Some introductory remarks. Acta Otolaryngol Suppl. 1961; 159: 7-14.