(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
Saccades
Description
Saccades: instruct the patient to make rapid movements of their eyes in each gaze direction, noting the speed, conjugacy, latency, and accuracy. First have the patient look between an eccentric target and the camera horizontally and vertically, making assessment of accuracy easier - e.g., overshooting the camera (hypermetria) or undershooting the camera (hypometria). Then have the patient make larger amplitude saccades horizontally and vertically, which makes assessment of speed and conjugacy easier (e.g., adduction lag suggests an internuclear ophthalmoplegia [INO], https://collections.lib.utah.edu/details?id=187742). Saccadic dysmetria is seen in cerebellar disease (or brainstem connections w/ cerebellum [https://collections.lib.utah.edu/details?id=187722&q=saccadic+dysmetria&fd=title_t%2Cdescription_t%2Csubject_t&facet_setname_s=ehsl_novel_gold]). Ipsilateral hypermetria and contralateral hypometria occurs in Wallenberg syndrome (https://collections.lib.utah.edu/details?id=187724). Slow saccades of restricted amplitude occur in motor nerve paresis or muscle weakness.
Date
2022
Language
eng
Format
video/mp4
Type
Image/MovingImage
Collection
Neuro-Ophthalmology Virtual Education Library: Dan Gold Neuro-Ophthalmology Collection: https://novel.utah.edu/Gold/
Publisher
North American Neuro-Ophthalmology Society
Holding Institution
Spencer S. Eccles Health Sciences Library, University of Utah, 10 N 1900 E SLC, UT 84112-5890