(OM) Department of Neurology, The Johns Hopkins School of Medicine, Baltimore, Maryland; (DRG) Departments of Neurology, Ophthalmology, Neurosurgery, Otolaryngology - Head & Neck Surgery, Emergency Medicine, and Medicine, The Johns Hopkins School of Medicine, Baltimore, Maryland
Subject
VOR Suppression
Description
VOR suppression (VORS): instruct the patient to fix on the camera which they should hold in front of their eyes, while turning their torso slowly in the horizontal plane. The vertical plane can then be assessed by instructing the patient to flex and extend the neck under the same conditions. A demonstration by the examiner is essential to guide the patient for this test. VORS will generally be saccadic when pursuit is saccadic and vice versa [https://collections.lib.utah.edu/details?id=1248765]. However, when pursuit is impaired and the VOR is lost (bilateral vestibular loss), VORS can look better than pursuit since there is no VOR to suppress [https://collections.lib.utah.edu/details?id=1256239]. Mild impairments of VORS may not be evident over a video connection (i.e., due to limited frames per second).
