Characteristics of vestibular corrective saccades in patients with slow visual saccades, vestibular disorders and controls: A descriptive analysis

PloS One
Dario Andres YacovinoTimothy Carl Hain

Abstract

Our aim was to determine whether overt catch up saccades (OS) provoked by vestibular stimuli, as observed in the video head impulse test (vHIT), have comparable metrics as visually triggered horizontal saccades (VS), indicating a common saccadic brainstem generator. Three groups of patients were studied: patients with neurological disorders causing slow saccades (group 1, n = 12), patients with peripheral vestibular lesions (group 2, n = 43), and normal controls (group 3, = 24). All patients underwent vHIT and Videooculographic testing. OS velocity, acceleration, amplitude and duration and VS velocity in this group was compared between the groups. There was significant reduction in the velocity of visually guided saccades in group 1, as expected from the patient selection constraints of this study. Group 1 also exhibited saccades which were longer in duration and of reduced acceleration when compared to subjects without saccadic slowing to visual targets (Group 2 and 3). There were significant positive correlations between OS acceleration and amplitude in both normal saccade groups (2 and 3) which was not observed in the slow saccade group (1). The metrics of overt saccades measured by the vHIT in patients with slow saccades an...Continue Reading

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Citations

Sep 14, 2019·Ear and Hearing·Angel Batuecas-CaletrioNicolás Perez Fernandez
Jun 27, 2020·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Dario A YacovinoEstefania Zanotti
Sep 15, 2020·Otology & Neurotology : Official Publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology·Dario A YacovinoEstefania Zanotti
Dec 21, 2020·International Journal of Pediatric Otorhinolaryngology·Ela CömertNuray Bayar Muluk
Nov 10, 2020·Journal of Vestibular Research : Equilibrium & Orientation·Chisato FujimotoToshihisa Murofushi

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Software Mentioned

MATLAB
vHIT
MathWorks

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