Ewald, J Richard

Timothy C Hain*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter


J. Richard Ewald (1855-1921) was a German physiologist to whom we owe important insights concerning vestibular function. He is best known for 'Ewald's second law,' which implies that in persons who have lost inner ear function on one side, the remaining side should produce higher velocity nystagmus when the head is being rotated toward the remaining intact ear (ampullopetal), but less when the head is being rotated toward the side of vestibular loss.

Original languageEnglish (US)
Title of host publicationEncyclopedia of the Neurological Sciences
PublisherElsevier Inc.
Number of pages1
ISBN (Electronic)9780123851574
ISBN (Print)9780123851581
StatePublished - Jan 1 2014


  • Ewald, J. Richard
  • Flourens, Marie-Jean-Pierre
  • Goltz, Friedrich Leopold
  • Head impulse test
  • Physiology
  • Schiff, Moritz
  • Semicircular canal
  • Vestibular function

ASJC Scopus subject areas

  • Medicine(all)


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