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Skull vibration nystagmus

Enrique García Zamora, Pedro Espírito-Santo Araújo, Vanesa Pérez Guillén, María Fernanda Vargas Gamarra, Victoria Fornés Ferrer, Magdalena Courel Rauch, Herminio Pérez Garrigues
HYPOTHESIS: The knowledge of vibration-induced nystagmus test (SVINT) values in the normal population is highly relevant to provide a rapid orientation on the diagnosis attitude in a patient with vertigo. BACKGROUND: Although mastoid bone vibration should only induce nystagmus in the presence of vestibular asymmetry, it has also been reported in normal individuals raising doubts as to how to interpret the SVINT. To date, no population studies involving the use of the SVINT and that establish normative values have been published...
June 1, 2018: European Archives of Oto-rhino-laryngology
Georges Dumas, Ian S Curthoys, Alexis Lion, Philippe Perrin, Sébastien Schmerber
A 100-Hz bone-conducted vibration applied to either mastoid induces instantaneously a predominantly horizontal nystagmus, with quick phases beating away from the affected side in patients with a unilateral vestibular loss (UVL). The same stimulus in healthy asymptomatic subjects has little or no effect. This is skull vibration-induced nystagmus (SVIN), and it is a useful, simple, non-invasive, robust indicator of asymmetry of vestibular function and the side of the vestibular loss. The nystagmus is precisely stimulus-locked: it starts with stimulation onset and stops at stimulation offset, with no post-stimulation reversal...
2017: Frontiers in Neurology
G Dumas, P Perrin, E Ouedraogo, S Schmerber
The skull vibration-induced nystagmus test is a robust, nonintrusive and easy to perform test. This test acts as a vestibular Weber test and is performed as a bedside examination. It usually instantaneously reveals vibration-induced nystagmus (VIN) even in long standing or chronic compensated unilateral vestibular lesions. The test requires stimulation at 30, 60 or more efficiently at 100Hz. The vibrator is applied perpendicularly to the skin on a subject sitting up straight on the right and then the left mastoid (level with external acoustic meatus) and vertex...
November 2016: European Annals of Otorhinolaryngology, Head and Neck Diseases
Georges Dumas, Alexis Lion, Philippe Perrin, Evariste Ouedraogo, Sébastien Schmerber
Vibration-induced nystagmus is elicited by skull or posterior cervical muscle stimulations in patients with vestibular diseases. Skull vibrations delivered by the skull vibration-induced nystagmus test are known to stimulate the inner ear structures directly. This study aimed to measure the vibration transfer at different cranium locations and posterior cervical regions to contribute toward stimulus topographic optimization (experiment 1) and to determine the force applied on the skull with a hand-held vibrator to study the test reproducibility and provide recommendations for good clinical practices (experiment 2)...
March 23, 2016: Neuroreport
Philippe Junet, Alexandre Karkas, Georges Dumas, Jean Louis Quesada, Sébastien Schmerber
Intratympanic injection of gentamicin is increasingly used in the treatment of unilateral disabling Menière's disease (MD). Several objective functional and subjective tests have been developed to assess the control of vertigo after gentamicin treatment. The aim of this study was to show that subjective results require a vestibular deafferentation as profound as possible, evidenced with multifrequency vestibular assessment. Sixty four patients with intractable MD in situation of medical treatment failure longer than 6 months were included between 1998 and 2013 in this case control study...
October 2016: European Archives of Oto-rhino-laryngology
F Beatrice, A Karkas, S Bucolo, A Palermo, F Perottino, A Lion, G Dumas
BACKGROUND: Nystagmus induced by vibrations (NIV), has been optimized by the present authors this last decade. The skull vibration-induced nystagmus test (SVINT) can be designated as a high-frequency global "vestibular Weber test" and can be considered as an office-based examination to detect vestibular asymmetry. The aim of this study is to define the tolerance of the SVINT as well as its comparison to the simplified caloric test of Veits (CTV) in normal workers during the pre-employment visit at the occupational medicine center...
2014: Revue de Laryngologie—Otologie—Rhinologie
Georges Dumas, Alexis Lion, Alexandre Karkas, Philippe Perrin, Flavio Perottino, Sébastien Schmerber
CONCLUSIONS: The skull vibration-induced nystagmus test (SVINT) acts as a vestibular Weber test and reveals a vibration-induced nystagmus (VIN), elicited mainly on the vertex location, with a horizontal or torsional component beating more often toward the side of the lesion in superior canal dehiscence (SCD) than in otosclerosis (OS). In SCD, the VIN vertical component is most often up-beating. These results suggest more a global vestibular contribution than the sole stimulation of the superior semicircular canal...
June 2014: Acta Oto-laryngologica
Shin C Beh, Ali Saber Tehrani, Amir Kheradmand, David S Zee
Acquired pendular nystagmus (PN) occurs commonly in multiple sclerosis (MS) and results in a highly disabling oscillopsia that impairs vision. It usually consists of pseudo-sinusoidal oscillations at a single frequency (3-5 Hz) that often briefly stop for a few hundred milliseconds after saccades and blinks. The oscillations are thought to arise from instability in the gaze-holding networks ("neural integrator") in the brainstem and cerebellum.(1,2) Here we describe a patient with monocular PN in whom vibration on the skull from a handheld muscle massager strikingly diminished or stopped her nystagmus...
April 15, 2014: Neurology
Georges Dumas, Alexis Lion, Gérome C Gauchard, Guillaume Herpin, Måns Magnusson, Philippe P Perrin
Skull vibration induces nystagmus in unilateral vestibular lesion (UVL) patients. Vibration of skull, posterior cervical muscles or inferior limb muscles alters posture in recent UVL patients. This study aimed to investigate the postural effect of vibration in chronic compensated UVL patients. Vibration was applied successively to vertex, each mastoid, each side of posterior cervical muscles and of triceps surae in 12 UVL patients and 9 healthy subjects. Eye movements were recorded with videonystagmography...
2013: Journal of Vestibular Research: Equilibrium & Orientation
Georges Dumas, Alexandre Karkas, Philippe Perrin, Karim Chahine, Sébastien Schmerber
OBJECTIVES: To establish the effectiveness of the skull vibration-induced nystagmus test (SVINT) as a rapid high-frequency stimulation test, in the evaluation of partial unilateral vestibular lesions (pUVL). METHODS: SVINT (30, 60, and 100 Hz), caloric, and head-shaking tests were performed in 99 patients with pUVL. These results were compared with those in 9 patients with symmetrical partial bilateral labyrinthine malformations, 131 patients with total unilateral vestibular lesions (tUVL), and 95 control subjects...
October 2011: Otology & Neurotology
Georges Dumas, Philippe Perrin, Sebastien Schmerber
CONCLUSION: The skull vibration-induced nystagmus test (SVINT) is a useful complementary test to the caloric test, which evaluates very low frequencies, and the head shaking test (HST), which explores medium range frequencies. These three tests are fully correlated in total unilateral vestibular lesions (tUVL) with a sensitivity of 98% and a specificity of 94% for the SVINT. The results of the interference of the SVINT with the cold caloric test on the intact ear suggest that different vestibular sensory cells are involved in these two tests...
March 2008: Acta Oto-laryngologica
G Dumas, C De Waele, K F Hamann, B Cohen, M Negrevergne, E Ulmer, S Schmerber
OBJECTIVES: To establish during a consensus meeting the fundamental basis, the validity criteria, the main indications and results of the skull vibration induced nystagmus test (SVINT) which explores the vestibule high frequencies. MATERIAL AND METHODS: The SVINT is applied on the mastoid process (right and left sides) at 100 Hz during 10 seconds on a sitting upright subject. Total unilateral peripheral lesions (tUVL: operated vestibular shwannomas, vestibular neurectomies) and partial unilateral peripheral lesions (pUVL: preoperative neuromas, Meniere's disease, vestibular neuritis, chemical labyrinthectomies) were studied...
September 2007: Annales D'oto-laryngologie et de Chirurgie Cervico Faciale
G Dumas, P Perrin, N Morel, D Q N'Guyen, S Schmerber
INTRODUCTION: Results of the skull vibratory test (SVT) in partial unilateral vestibular peripheral lesions (PUVL) are different from the results in total vestibular lesions (TUVL). AIM: To reveal a correlation between the results of the analysis of the skull vibratory nystagmus (SVN) horizontal component and the side of the lesion; to correlate these results with the stimulus frequency. To find out a predictive correlation between the SVN horizontal and vertical components and the topography of a vestibular lesion...
2005: Revue de Laryngologie—Otologie—Rhinologie
N Perez
OBJECTIVE: To analyze the incidence and characteristics of vibration-induced nystagmus in normal subjects and in patients with vertigo. STUDY DESIGN AND SETTING: This is a prospective analysis of the effect of vibration on several points of the skull in 38 normal subjects, 10 patients who had undergone labyrinthectomy and 125 consecutive patients with dizziness referred to a tertiary care center. Nystagmus was documented and its corresponding slow phase velocity measured with a videonystagmography system...
2003: Revue de Laryngologie—Otologie—Rhinologie
Mikael Karlberg, Swee T Aw, Ross A Black, Michael J Todd, Hamish G MacDougall, G Michael Halmagyi
Vibration is an excitatory stimulus for both vestibular and proprioceptive afferents. Vibration applied either to the skull or to the neck muscles of subjects after unilateral vestibular deafferentation induces nystagmus and a shift of the subjective visual horizontal. Previous studies have ascribed these effects to vibratory stimulation of neck muscle proprioceptors. Using scleral search coils, we recorded three-dimensional eye movements during unilateral 92 Hz vibration of the mastoid bone or of the sternocleidomastoid (SCM) muscle in 18 subjects with chronic unilateral vestibular deficits after vestibular neurectomy or neuro-labyrinthitis...
April 2003: Brain: a Journal of Neurology
J Michel, G Dumas, J P Lavieille, R Charachon
On subjects with unilateral vestibular dysfunction, the application of a vibratory stimulation (100 Hz) to the two mastoids and the vertex, and to the right and left dorsal neck muscles produces a nystagmus directed towards the good ear in 85% of patients. Fixation must be suppressed by Frenzel's glasses or video nystagmoscopy. To be significant this nystagmus must appear in at least 3 of the 5 vibratory stimulated sites. On healthy subjects nystagmus is present in 6% of cases but never in those below 30 years...
2001: Revue de Laryngologie—Otologie—Rhinologie
G Dumas, J Michel, J P Lavieille, E Ouedraogo
Nystagmus signaling vestibular dysfunction was observed after vibratory stimulation with a 100 Hz ABC stimulator in a population of 36 patients with unilateral labyrinthine pathology (ULP) (pre and postoperative neuromas, vestibular neurectomies) and 10 patients with vestibular neuritis. The stimulus was applied on 3 bony points of the skull (vertex and 2 mastoids) and 2 muscular points of the neck (right and left posterior cervical region). These results were compared with those in 95 normal subjects and 19 cases of central disease and were correlated on the same day with results of the caloric test and head shaking test (HST)...
November 2000: Annales D'oto-laryngologie et de Chirurgie Cervico Faciale
T Isu, K Tashiro, K Mitsumori, M Sato, M Tsuru
A rare case of intramedullary schwannoma of the spinal cord has been reported, The patient was a 30-year-old woman, who began to notice weakness in her right leg approximately 6 months prior to admission, followed 4 months later by numbness and weakness of the right arm. The above symptoms were progressively getting worse, and she was admitted to Hokkaido University Hospital on February 23, 1974. Neurological examination revealed slow speech, bilateral horizontal nystagmus, absent gag reflex and weakness of right trapezius muscle...
September 1976: No Shinkei Geka. Neurological Surgery
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