Electronystagmography

Electronystagmography (pronunciation: e-lek-tro-nis-tag-mog-raphy) is a diagnostic test used to record involuntary movements of the eye caused by a condition known as Nystagmus. It can also be used to diagnose the cause of Vertigo, Dizziness, and Balance Dysfunction.

Etymology

The term "Electronystagmography" is derived from three Greek words: "electron" meaning amber, referring to the electrical signals, "nystagmos" which means drowsy or sleepy, and "graphy" meaning to write.

Procedure

Electronystagmography involves attaching electrodes to the skin around the eyes and recording eye movements. The test is divided into three parts: Caloric Stimulation, Ocular Motor Testing, and Positional Nystagmus Testing.

Related Terms

Nystagmus: An involuntary eye movement which may cause the eye to rapidly move from side to side, up and down, or in a circle.
Vertigo: A sensation of feeling off balance, often described as a spinning sensation.
Dizziness: A term used to describe a range of sensations, such as feeling faint, woozy, weak or unsteady.
Balance Dysfunction: A condition that makes you feel unsteady or dizzy, as if you are moving, spinning, or floating, even though you are standing still or lying down.
Caloric Stimulation: A test that involves delivering warm or cool air or water into a person's ear canal to test the function of a part of the inner ear.
Ocular Motor Testing: Tests that evaluate the function of the eye muscles and the nerves that control them.
Positional Nystagmus Testing: A test that involves moving the head into various positions to determine if it causes nystagmus and vertigo.