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Efficient gaze stabilization during video Active Gaze Shift Test (vAGST) in bilateral vestibulopathy.
Front Neurol
December 2024
Institut de Recherche Oto-Neurologique (IRON), Paris, France.
Introduction: While most head movements in daily life are active, most tools used to assess vestibular deficits rely on passive head movements. A single gain value is not sufficient to quantify gaze stabilization efficiency during active movements in vestibular deficit patients. Moreover, during active gaze shifts, anticipatory mechanisms come into play.
View Article and Find Full Text PDFIsolated Corrective Saccades in the Bilateral Posterior Canal Stimulation During the Video Head Impulse Test: A Marker of Central Vestibulopathy?
Ear Hear
December 2024
Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, Charleston, South Carolina, USA.
Objectives: This study aimed to determine if the presence of corrective saccades during video head impulse test (vHIT) stimulation of the bilateral posterior semicircular canals (PSCs) correlated with other vestibular test results, demographics, symptoms, or diagnoses.
Design: This study was a retrospective chart review where 1006 subjects' vHIT records were screened with 17 subjects meeting inclusion criteria for isolated bilateral PSC saccades.
Results: Of the 1006 patients undergoing vHIT testing, only 1.
Catch-Up Saccades in Vestibulo-Ocular Reflex Deficit: Contribution of Visual Information?
Ear Hear
December 2024
Institut national de la santé et de la recherche médicale, U1028, Centre National de Recherche Scientifique, UMR5292, Lyon Neuroscience Research Center, Integrative Multisensory Perception and ACTion Team, Lyon, France.
Objectives: Catch-up saccades help to compensate for loss of gaze stabilization during rapid head rotation in case of vestibular deficit. While overt saccades observed after head rotation are obviously visually guided, some of these catch-up saccades occur with shorter latency while the head is still moving, anticipating the needed final eye position. These covert saccades seem to be generated based on the integration of multisensory inputs.
View Article and Find Full Text PDFBilateral Middle Cerebellar Peduncle Infarction Presenting With Vertigo and Hearing Impairment Mimicking Peripheral Vestibulopathy.
Cureus
December 2024
Department of Radiology, School of Medical Sciences, Universiti Sains Malaysia, Kubang Kerian, MYS.
Bilateral middle cerebellar peduncle (MCP) infarction is a rare manifestation of ischemic stroke. We report a middle-aged male patient who presented with acute onset of vertigo, left ear deafness, and severe ataxia. Magnetic resonance imaging (MRI) of the brain confirmed the presence of infarction in the bilateral middle cerebellar peduncles due to stenosis of the posterior circulation arteries.
View Article and Find Full Text PDFThe relationship between the vestibular system and the circadian timing system: A review.
Sleep Med
December 2024
Université de Caen Normandie, INSERM, Normandie Université, COMETE UMR-S 1075, GIP Cyceron, Caen, F-14000, France.
This review attempts to analyze the relationship between the vestibular system and the circadian timing system. The activity of the biological clock allows an organism to optimally perform its tasks throughout the nychtemeron. To achieve this, the biological clock is subjected to exogenous factors that entrain it to a 24h period.
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