Electronystagmography (ENG) testing is a balance of the mechanism of the inner ear (the vestibular system). Through an ENG we are able to gain useful information on patients who suffer from disturbed equilibrium and balance disorders. By observing eye movements during a series of visual and vestibular stimulations we can determine how well the balance mechanism is functioning. The ENG is a diagnostic system for recording and analyzing involuntary eye movements called nystagmus.
There are four main parts to Electronystagmography (ENG) testing:
Calibration Testing: Evaluates rapid eye movements. The participant follows a light about 6 to 10 feet away with her or his. This test measures ocular dysmetria.
Tracking Testing: Evaluates eye movements as one follow a visual target. For example, the participant follows a light with her or his eyes as it moves like a pendulum.
Positional Testing: Positional testing measures dizziness associated with different positions of the head. For example, you may be instructed to turn your head quickly or sit up quickly if you’ve been lying down. We then record the amont of eye motion with each activity.
Caloric Testing: Caloric testing measures responses to warm and cold air administered to the ear canal. If there are no problems, the eyes will move involuntarily to the stimulus.