Electronystagmography
Alternative names:
ENG
Normal values:
Distinct nystagmus (eye movement) should occur after instillation of cold or hot water into the ear canal.
What abnormal results mean:
If the expected nystagmus does not occur, there may be some damage to the nerve of the inner ear.
Any disease or injury that damages the acoustic nerve can cause vertigo. This may include congenital disorders; trauma; rubella; vascular (blood vessel) disorders with hemorrhage (bleeding), thrombosis (clots), or atherosclerosis of the blood supply of the ear; cholesteatoma and other ear tumors; some poisons; and ototoxic (toxic to the ear nerves) medications including aminoglycoside antibiotics, some antimalarial drugs, loop diuretics, and salicylates.
Additional conditions under which the test may be performed:
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