WHAT IS ELECTRONYSTAGMOGRAPHY (EYE MOVEMENT, ENG) TEST?
The technique for recording eye movements allowing exact quantification of physiologic and pathologic nystagmus. The test picks up subtle, spontaneous nystagmus and also helps differentiate peripheral from central nystagmus. The battery of tests includes visual ocular control, the search for pathologic nystagmus with fixation and with eyes open in the darkness, and measurement of induced physiologic nystagmus (caloric and rotational). The test can be helpful in identifying a vestibular lesion and localising it within the peripheral and central pathways. It also provides serial tracings to compare a client’s pattern over time.