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Sensation is dispensable for the maturation of the vestibulo-ocular reflex.
Science
January 2025
Department of Otolaryngology, Department of Neuroscience and Physiology, and the Neuroscience Institute, NYU Grossman School of Medicine, New York, NY, USA.
Vertebrates stabilize gaze using a neural circuit that transforms sensed instability into compensatory counterrotation of the eyes. Sensory feedback tunes this vestibulo-ocular reflex throughout life. We studied the functional development of vestibulo-ocular reflex circuit components in the larval zebrafish, with and without sensation.
View Article and Find Full Text PDFEfficient 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 PDFClinical observations from the clinical video head pulse test in patients with idiopathic horizontal semicircular canal light cupula.
Front Neurol
December 2024
Department of Neurology, Dongzhimen Hospital Affiliated to Beijing University of Chinese Medicine, Beijing, China.
Objective: The objective of the study is to analyze and explore the characteristics of the video head impulse test (vHIT) for light cupula in the idiopathic horizontal semicircular canal and compare them with those of horizontal semicircular canal cupulolithiasis (HC-cu) in order to investigate the potential mechanism involved.
Methods: Data from 51 cases of idiopathic light cupula and 42 cases of horizontal semicircular canal cupulolithiasis were retrospectively analyzed. The positional nystagmus features, vHIT anomaly rate, gain value, saccades, and other indicators were compared.
Assessment of an eye-tracking tool to discriminate between concussed and not concussed professional male rugby players: a cohort study.
Phys Sportsmed
December 2024
Medical Department, World Rugby, Dublin, Ireland.
Objectives: Concussion is a common injury in rugby union ('rugby') and yet its diagnosis is reliant on clinical judgment. Oculomotor testing could provide an objective measure to assist with concussion diagnosis. NeuroFlex® evaluates oculomotor function using a virtual-reality headset.
View Article and Find Full Text PDFCatch-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.
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