Nystagmus (mnemonic)

A helpful mnemonic to remember the expected direction of nystagmus during a caloric test is:

  • COWS


  • Cold-Opposite
  • Warm-Same

Following ear stimulation with water (left ear):

  • cold water (cooler than body temperature), a right-beating nystagmus (directed toward the opposite ear) results
  • warm water (warmer than body temperature), a left-beating nystagmus (directed toward the same left ear) occurs

Similar, but oppositely-directed responses occur for the right ear.

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Article information

rID: 6936
System: Head & Neck
Section: Mnemonics
Tags: ent, cases
Synonyms or Alternate Spellings:
  • COWS

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