Electronystagmography
 
 

Electronystagmography

Electronystagmography, also known as an ENG, analyzes movement of the eyes to determine how effective brain nerves are functioning. Electrode patches are placed near the eyes and forehead and electrodes record eye movements when nerves are stimulated using varying degrees of water and air sprayed in the ear canal. The individual is also asked to follow moving objects or flashing lights with their eyes. The test is performed to learn whether the cause of vertigo or dizziness is a nervous disorder. This test is also sometimes conducted to help diagnose hearing loss.