Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy

Melissa Blanco; Chiara Monopoli-Roca; Marta Álvarez de Linera-Alperi; Pablo Menéndez Fernández-Miranda; Bárbara Molina; Ángel Batuecas-Caletrío; Nicolás Pérez-Fernández

doi:10.20944/preprints202405.0418.v1

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preprints.org > medicine and pharmacology > otolaryngology > doi: 10.20944/preprints202405.0418.v1

Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy

Melissa Blanco

Chiara Monopoli-Roca

Marta Álvarez de Linera-Alperi

^* ,

Pablo Menéndez Fernández-Miranda

Bárbara Molina

Ángel Batuecas-Caletrío

Nicolás Pérez-Fernández

Version 1 : Received: 6 May 2024 / Approved: 7 May 2024 / Online: 8 May 2024 (09:46:06 CEST)

How to cite: Blanco, M.; Monopoli-Roca, C.; Álvarez de Linera-Alperi, M.; Menéndez Fernández-Miranda, P.; Molina, B.; Batuecas-Caletrío, Á.; Pérez-Fernández, N. Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy. Preprints 2024, 2024050418. https://doi.org/10.20944/preprints202405.0418.v1 Blanco, M.; Monopoli-Roca, C.; Álvarez de Linera-Alperi, M.; Menéndez Fernández-Miranda, P.; Molina, B.; Batuecas-Caletrío, Á.; Pérez-Fernández, N. Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy. Preprints 2024, 2024050418. https://doi.org/10.20944/preprints202405.0418.v1

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MDPI and ACS Style

Blanco, M.; Monopoli-Roca, C.; Álvarez de Linera-Alperi, M.; Menéndez Fernández-Miranda, P.; Molina, B.; Batuecas-Caletrío, Á.; Pérez-Fernández, N. Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy. Preprints 2024, 2024050418. https://doi.org/10.20944/preprints202405.0418.v1

APA Style

Blanco, M., Monopoli-Roca, C., Álvarez de Linera-Alperi, M., Menéndez Fernández-Miranda, P., Molina, B., Batuecas-Caletrío, Á., & Pérez-Fernández, N. (2024). Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy. Preprints. https://doi.org/10.20944/preprints202405.0418.v1

Chicago/Turabian Style

Blanco, M., Ángel Batuecas-Caletrío and Nicolás Pérez-Fernández. 2024 "Visual Fixation of Skull Vibration Induced Nystagmus in Patients with Peripheral Vestibulopathy" Preprints. https://doi.org/10.20944/preprints202405.0418.v1

Abstract

Nystagmus induced by applying an intense vibratory stimulus to the skull (SVIN) indicates vestibular functional asymmetry. In unilateral vestibular loss, a 100-Hz bone-conducted vibration given to either mastoid immediately causes a primarily horizontal nystagmus. Test is performed in darkness to avoid visual fixation (VF) but there is no data about how much VF affects the often-intense SVIN. The aim is to analyze the amount of reduction of SVIN when VF is allowed during testing. Thus, all patients seen in a tertiary hospital for vertigo or dizziness with positive SVIN were included. SVIN was recorded for 10 seconds for each condition: without VF (aSVINwo) and VF (aSVINw). We obtained an aSVINwo and aSVINw as average slow-phase velocities (SPV) without and with VF. VF index (FISVIN) was calculated as the ratio of SPV. Among the 124 patients included, spontaneous nystagmus (SN) was found in 25% and the mSPV (without VF) of SN was 2.62.4º/s. Mean FISVIN was 0.270.29. FISVIN was 0 in 42 patients and >0 FISVIN <1 in 82 (mean FISVIN 0.390.02). Fixation suppression was found in all patients with SVIN in cases of peripheral vestibulopathy. FISVIN clearly delineates two populations of patients: with or without complete visual reduction of nystagmus.

Keywords

skull vibration induced nystagmus; visual fixation; peripheral vestibulopathy

Subject

Medicine and Pharmacology, Otolaryngology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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