Buzzing Sympathetic Nerves: A New Test to Enhance Anisocoria in Horner's Syndrome.

ABSTRACT: Introduction: Patients with suspected Horner's syndrome having equivocal pupil dilation lag and pharmacologic testing may undergo unnecessary MR imaging and work up in the case of false positive pupil test results. Our goal was to increase the diagnostic accuracy of pupillometry by accentuating the inter-ocular asymmetry of sympathetic innervation to the iris dilator with surface electrical stimulation of the median nerve using a standard electromyography machine. We hypothesized that an accentuated difference in sympathetic response between the two eyes would facilitate the diagnosis of Horner's syndrome. Methods: Eighteen patients with pharmacologically proven Horner's syndrome were compared to ten healthy volunteers tested before and after monocular instillation of 0.2% br

SUBMITTER: Omary R 

PROVIDER: S-EPMC6393781 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature