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https://www.readbyqxmd.com/read/29915556/the-reliance-on-vestibular-information-during-standing-balance-control-decreases-with-severity-of-vestibular-dysfunction
#1
Joost van Kordelaar, Jantsje H Pasma, Massimo Cenciarini, Alfred C Schouten, Herman van der Kooij, Christoph Maurer
The vestibular system is involved in gaze stabilization and standing balance control. However, it is unclear whether vestibular dysfunction affects both processes to a similar extent. Therefore, the objective of this study was to determine how the reliance on vestibular information during standing balance control is related to gaze stabilization deficits in patients with vestibular dysfunction. Eleven patients with vestibular dysfunction and twelve healthy subjects were included. Gaze stabilization deficits were established by spontaneous nystagmus examination, caloric test, rotational chair test, and head impulse test...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29905001/healing-criteria-how-should-be-defined-an-episode-of-benign-paroxistic-positional-vertigo-of-posterior-semicircular-canal-s-resolution-prospective-observational-study
#2
G Guerra-Jiménez, E Domènech-Vadillo, M G Álvarez-Morujo de Sande, R González-Aguado, H Galera-Ruiz, C Morales Angulo, A J Martín-Mateos, E Figuerola-Massana, Á Ramos-Macías, E Domínguez-Durán
OBJECTIVES: To compare the outcome of the Epley maneuver (EM) in benign paroxysmal positional vertigo of the posterior canal (CSP-BPPV) depending on the definition used for recovery. DESIGN: Multicenter observational prospective study. SETTING: Otoneurology Units of five tertiary reference hospitals. PARTICIPANTS: All patients presenting with unilateral CSP-BPPV assisted for one-year period. EXCLUSION CRITERIA: Spontaneous nystagmus, positive McClure-Pagnini maneuver, positive bilateral Dix-Hallpike maneuver (DHM), positive DHM for vertigo but negative for nystagmus and atypical nystagmus...
June 15, 2018: Clinical Otolaryngology
https://www.readbyqxmd.com/read/29798145/-photochemical-induced-vestibular-ischemia%C3%AE-with-icy-water-test-in-guinea-pigs
#3
F Lv, L Y Wang, W N Huang, H T Song, X Gong, X H Liu
Objective: To ascertain the effects of a new method of photochemical reaction in vestibular function in guinea pigs. Method: Local photochemical reaction was initiated by systemic injection of rose bengal(20mg), photoillumination of the vestibule through medial wall of epitympanum for 30 minutes was started immediately after the injection of rose bengal, with a optic fiber connected to a xenon light (wavelength, 540nm; photointense, 500-600 mW/cm ²). There were 20 guinea pigs divided random equally into 2 groups...
April 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29792303/recurrent-spontaneous-vertigo-with-interictal-headshaking-nystagmus
#4
Sun-Uk Lee, Jeong-Yoon Choi, Hyo-Jung Kim, Ji-Soo Kim
OBJECTIVE: To define a disorder characterized by recurrent spontaneous vertigo (RSV) of unknown etiology and interictal headshaking nystagmus (HSN). METHODS: We characterized HSN in 35 patients with RSV-HSN compared to that recorded in randomly selected patients with compensated vestibular neuritis (VN), vestibular migraine (VM), and Ménière disease (MD). RESULTS: The estimated time constant (TC) of the primary phase of HSN was 12 seconds (95% confidence interval [CI] 12-13) in patients with RSV-HSN, which was larger than those in patients with VN (5 seconds, 95% CI 4-5), VM (5 seconds, 95% CI 5-6), or MD (6 seconds, 95% CI 5-6)...
May 23, 2018: Neurology
https://www.readbyqxmd.com/read/29757553/-the-manifestation-of-videonystamography-in-the-patients-with-posterior-circulation-ischemia-vertigo
#5
Hao Wei Wang, Ying Guo, Jing Zhou, Hui Fang Zhou
Objective: To investigate the changes of vedionystamography(VNG)in patients with posterior circulation ischemia vertigo(PCIV). Method: Fifty patients who complained of vertigo and imbalance with PCI were selected as experimental group for testing of visual nystamography(VNG).Thirty normal subjects were chosen as control group.The result was analyzed. Result: The results of VNG in PCIV group and the control group were compared.The abnormal ratio were as follows:(4%,0; P >0.05)for Spontaneous nystagmus,(68%,10%; P <0...
January 20, 2018: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29748450/concurrent-eng-and-vng-recording-in-healthy-people-preliminary-report
#6
Marzena Bielińska, Anna Polaczkiewicz, Piotr Pietkiewicz, Jarosław Miłoński, Jurek Olszewski
INTRODUCTION: The aim of the study was to evaluate concurrent recording of ENG and VNG measurements in selected diagnostic tests in healthy subjects so as to explore potential sensitivity and applicability of this kind of testing in the diagnostics of vertigo. MATERIAL AND METHODS: The study was carried out in 50 healthy subjects including 24 women and 26 men aged 20-22 (mean age of 20.5 years) reporting no otorhinolaryngological organ-related complaints and no history of any balance disorders or vertigo...
April 30, 2018: Otolaryngologia Polska
https://www.readbyqxmd.com/read/29728166/long-term-evaluation-of-the-effect-of-middle-ear-effusion-on-the-vestibular-system-in-children
#7
Katarzyna Pazdro-Zastawny, Lucyna Pośpiech, Tomasz Zatoński
BACKGROUND: Otitis media with effusion (OME) is one of the most common clinical conditions in childhood. Fluid accumulation in the middle ear may impact inner ear. OBJECTIVES: The purpose of this random sample cohort study was to investigate whether the past history of middle ear effusion has a long-term negative impact on the vestibular system in children. MATERIAL AND METHODS: The study was carried out on 22 children aged 7-15 years who had undergone drainage of the middle ear 5 years before evaluation...
June 2018: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/29684032/pseudo-spontaneous-nystagmus-in-patients-with-geotropic-direction-changing-positional-nystagmus
#8
Seok Min Hong, Sung Kyun Kim, Il-Seok Park, Min Gyeong Shim
BACKGROUND: Pseudo-spontaneous nystagmus has been reported in patients with direction-changing positional nystagmus (DCPN). Recently, the concept of a "light cupula" has been introduced as a pathophysiology that can exhibit persistent geotropic DCPN. Patients with persistent DCPN could have different characteristics of nystagmus. Therefore, we investigated the pseudo-spontaneous nystagmus in patients with transient (canalolithiasis) and persistent (belong to light cupula theory) geotropic DCPN...
2018: PloS One
https://www.readbyqxmd.com/read/29593643/spontaneous-nystagmus-in-the-dark-in-an-infantile-nystagmus-patient-may-represent-negative-optokinetic-afternystagmus
#9
Ting-Feng Lin, Christina Gerth-Kahlert, James V M Hanson, Dominik Straumann, Melody Ying-Yu Huang
Abnormal projection of the optic nerves to the wrong cerebral hemisphere transforms the optokinetic system from its usual negative feedback loop to a positive feedback loop with characteristic ocular motor instabilities including directional reversal of the optokinetic nystagmus (OKN) and spontaneous nystagmus, which are common features of infantile nystagmus syndrome (INS). Visual input plays a critical role in INS linked to an underlying optic nerve misprojection such as that often seen in albinism. However, spontaneous nystagmus often continues in darkness, making the visual, sensory-driven etiology questionable...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29593640/vestibular-dysfunction-in-wernicke-s-encephalopathy-predominant-impairment-of-the-horizontal-semicircular-canals
#10
Seung-Han Lee, Sang-Hoon Kim, Ji-Min Kim, Alexander Andrea Tarnutzer
Background: Wernicke's encephalopathy (WE), a metabolic disorder due to thiamine deficiency, manifests with various neurological symptoms and signs. It has been known as a cause of vestibular dysfunction. Preliminary reports have proposed predominant involvement of the horizontal semicircular canals (HSCs). Objective: To better characterize the pattern of vestibular impairment in patients with WE using quantitative video head-impulse testing and to review the literature regarding this topic...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29545765/clinical-characteristics-and-etiology-of-bilateral-vestibular-loss-in-a-cohort-from-central-illinois
#11
Jorge C Kattah
Background: Previous series of bilateral vestibular loss (BVL) identified numerous etiologies, but surprisingly, a cause in a significant number of cases remains unknown. In an effort to understand possible etiology and management strategies, a global effort is currently in progress. Here, I contribute my 10-year experience with both acute and chronic BVL during the 2007-2017 decade. Methods: This is a retrospective review of the charts and EMR of patients diagnosed with BVL in the last 10 years...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29488491/-the-peculiar-features-of-vestibular-function-disorders-associated-with-meniere-s-disease
#12
V T Pal'chun, A L Guseva, S D Chistov
AIM: The objective of the present study was to reveal the special aspects of vestibular dysfunction in the patients presenting with unilateral Meniere's disease (MD) during the attack-free intervals. METHODS: The study included 23 patients suffering from unilateral MD; all of them were examined with the use of tonal threshold audiometry, videonystagmography, the caloric test and video head-impulse test (vHIT). RESULTS: The study has demonstrated that the patients with MD are characterized, during the attack-free intervals, by the absence of latent spontaneous nystagmus in conjunction with the positive results of the head shaking test...
2018: Vestnik Otorinolaringologii
https://www.readbyqxmd.com/read/29373699/characteristics-and-mechanism-of-apogeotropic-central-positional-nystagmus
#13
Jeong-Yoon Choi, Stefan Glasauer, Ji Hyun Kim, David S Zee, Ji-Soo Kim
Here we characterize persistent apogeotropic type of central positional nystagmus, and compare it with the apogeotropic nystagmus of benign paroxysmal positional vertigo involving the lateral canal. Nystagmus was recorded in 27 patients with apogeotropic type of central positional nystagmus (22 with unilateral and five with diffuse cerebellar lesions) and 20 patients with apogeotropic nystagmus of benign paroxysmal positional vertigo. They were tested while sitting, while supine with the head straight back, and in the right and left ear-down positions...
January 24, 2018: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/29330961/clinical-value-of-4-hour-delayed-gadolinium-enhanced-3d-flair-mr-images-in-acute-vestibular-neuritis
#14
Hayoung Byun, Jae Ho Chung, Seung Hwan Lee, Chul Won Park, Dong Woo Park, Tae Yoon Kim
OBJECTIVE: To investigate the clinical significance of 4-hour delayed-enhanced 3.0 Tesla three-dimensional (3D) fluid-attenuated inversion recovery (FLAIR) magnetic resonance (MR) imaging in acute vestibular neuritis. STUDY DESIGN: A prospective observational study. METHODS: Twenty-nine vestibular neuritis patients were enrolled between January 2017 and June 2017. Vestibular function tests, comprising the caloric and video head impulse tests and vestibular-evoked myogenic potential measurements, were performed...
January 13, 2018: Laryngoscope
https://www.readbyqxmd.com/read/29327737/uphill-downhill-nystagmus
#15
M Gufoni
Differential diagnosis between peripheral and central spontaneous nystagmus can be difficult to classify (as peripheral or central) even on the basis of criteria recommended in the recent literature. The aim of this paper is to use the combination of spontaneous nystagmus and ocular tilt reaction to determine the site of origin of the disease that causes nystagmus. We propose to classify the nystagmus in: 1) "Uphill" nystagmus in which the nystagmus takes on an inclined plane and the direction of the fast phase is towards the hypertropic eye (this type of nystagmus is likely peripheral); 2) "Downhill" nystagmus when the nystagmus beats toward the hypotropic eye (this type of nystagmus is likely central); 3) "Flat" nystagmus when the plane on which nystagmus beats is perfectly horizontal: in this case, we cannot say anything about the site of lesion (it was only detected in 15% of cases)...
December 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29194214/prediction-of-vestibular-imbalance-in-acute-peripheral-vestibulopathy-by-measuring-horizontal-ocular-deviation-on-magnetic-resonance-imaging
#16
Yeon-Jun Yang, Kun Woo Kim, Ji Eun Choi, Min Young Lee, Dong Soo Yoo, Jae Yun Jung
OBJECTIVES: The aim of the study is to evaluate whether horizontal ocular deviation (OD) from MR imaging in the emergency room (ER) reflects vestibular imbalance, by comparing the horizontal OD in patients with acute vestibulopathy to controls. STUDY DESIGN: Retrospective review. PATIENTS AND METHODS: A total of 69 patients with acute unilateral peripheral vestibulopathy and 30 healthy subjects were included. Horizontal OD was quantified by using the axial T2-weighted fast-spin echo (FSE) images of the brain at 1...
February 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29187759/binocular-cyclotorsion-in-superior-vestibular-neuritis
#17
R Lapenna, A Pellegrino, G Ricci, C Cagini, M Faralli
Conjugated cyclotorsion of the eyes toward the affected side can commonly be observed in vestibular neuritis. The aim of this study was to assess the differences in cyclotorsion between the ipsi- and contralesional eye during selective involvement of the superior branch of the vestibular nerve. We studied binocular cyclotorsion through ocular fundus photographs in 10 patients affected by acute superior vestibular neuritis (SVN). Cyclotorsion was also studied in 20 normal subjects. All SVN patients showed an ipsilesional cycloversion of the eyes...
November 30, 2017: Acta Otorhinolaryngologica Italica
https://www.readbyqxmd.com/read/29170652/characteristic-eye-movements-in-ataxia-telangiectasia-like-disorder-an-explanatory-hypothesis
#18
Pamela Federighi, Stefano Ramat, Francesca Rosini, Elena Pretegiani, Antonio Federico, Alessandra Rufa
Objective: To investigate cerebellar dysfunctions and quantitatively characterize specific oculomotor changes in ataxia-telangiectasia-like disorder (ATLD), a rare autosomal recessive disease caused by mutations in the MRE11 gene. Additionally, to further elucidate the pathophysiology of cerebellar damage in the ataxia-telangiectasia (AT) spectrum disorders. Methods: Saccade dynamics, metrics, and visual fixation deficits were investigated in two Italian adult siblings with genetically confirmed ATLD...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29163350/differential-diagnosis-of-vertigo-in-the-emergency-department-a-prospective-validation-study-of-the-standing-algorithm
#19
Simone Vanni, Rudi Pecci, Jonathan A Edlow, Peiman Nazerian, Rossana Santimone, Giuseppe Pepe, Marco Moretti, Andrea Pavellini, Cosimo Caviglioli, Claudia Casula, Sofia Bigiarini, Paolo Vannucchi, Stefano Grifoni
Objective: We investigated the reliability and accuracy of a bedside diagnostic algorithm for patients presenting with vertigo/unsteadiness to the emergency department. Methods: We enrolled consecutive adult patients presenting with vertigo/unsteadiness at a tertiary hospital. STANDING, the acronym for the four-step algorithm we have previously described, based on nystagmus observation and well-known diagnostic maneuvers includes (1) the discrimination between S pon TA neous and positional nystagmus, (2) the evaluation of the N ystagmus D irection, (3) the head I mpulse test, and (4) the evaluation of equilibrium (sta N din G )...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/29129037/eye-movement-abnormalities-in-middle-cerebellar-peduncle-strokes
#20
Sung-Hee Kim, Ji-Soo Kim
The middle cerebellar peduncle (MCP) is a major conduit for cortico-ponto-cerebellar fibers that convey information related to eye movements. This study aims to elucidate eye movement abnormalities that arise from lesions confined to the MCP. In 23 patients with acute strokes restricted to unilateral MCPs, we investigated the clinical features and ocular motor findings including spontaneous nystagmus, saccades, smooth pursuit, ocular tilt reaction, and head impulse tests. Bithermal caloric tests and audiometry were also performed...
November 11, 2017: Acta Neurologica Belgica
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