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Vestibulopathy

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https://www.readbyqxmd.com/read/29770122/acute-unilateral-audiovestibulopathy-due-to-embolic-labyrinthine-infarction
#1
Zhong Liqun, Kee-Hong Park, Hyo-Jung Kim, Sun-Uk Lee, Jeong-Yoon Choi, Ji-Soo Kim
Introduction: Labyrinthine infarction is a cause of acute audiovestibulopathy, but can be diagnosed only in association with other infarctions involving the brainstem or cerebellar areas supplied by the anterior inferior cerebellar artery (AICA) since current imaging techniques cannot visualize an infarction confined to the labyrinth. This case series aimed to establish embolic labyrinthine infarction as a mechanism of isolated acute audiovestibulopathy. Methods: We analyzed clinical features, imaging findings, and mechanisms of embolism in 10 patients (8 men, age range: 38-76) who had developed acute audiovestibulopathy in association with an obvious source of embolism and concurrent acute embolic infarctions in the non-anterior inferior cerebellar artery territories...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29740388/central-lesions-with-selective-semicircular-canal-involvement-mimicking-bilateral-vestibulopathy
#2
REVIEW
Luke Chen, G Michael Halmagyi
Bilateral vestibulopathy (BVP), which is due to peripheral lesions, may selectively involve certain semicircular canal (SCC). Recent eye movement recordings with search coil and video head impulse test (HIT) have provided insight in central lesions that can cause bilateral and selective SCC deficit mimicking BVP. Since neurological signs or ocular motor deficits maybe subtle or absent, it is critical to recognize central lesions correctly since there is prognostic and treatment implication. Acute floccular lesions cause bilateral horizontal SCC (HC) impairment while leaving vertical SCC function unaffected...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29719527/vestibular-evoked-myogenic-potentials-in-bilateral-vestibulopathy
#3
REVIEW
Sally M Rosengren, Miriam S Welgampola, Rachael L Taylor
Bilateral vestibulopathy (BVP) is a chronic condition in which patients have a reduction or absence of vestibular function in both ears. BVP is characterized by bilateral reduction of horizontal canal responses; however, there is increasing evidence that otolith function can also be affected. Cervical and ocular vestibular-evoked myogenic potentials (cVEMPs/oVEMPs) are relatively new tests of otolith function that can be used to test the saccule and utricle of both ears independently. Studies to date show that cVEMPs and oVEMPs are often small or absent in BVP but are in the normal range in a significant proportion of patients...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29692756/hierarchical-cluster-analysis-of-semicircular-canal-and-otolith-deficits-in-bilateral-vestibulopathy
#4
Alexander A Tarnutzer, Christopher J Bockisch, Elena Buffone, Konrad P Weber
Background: Gait imbalance and oscillopsia are frequent complaints of bilateral vestibular loss (BLV). Video-head-impulse testing (vHIT) of all six semicircular canals (SCCs) has demonstrated varying involvement of the different canals. Sparing of anterior-canal function has been linked to aminoglycoside-related vestibulopathy and Menière's disease. We hypothesized that utricular and saccular impairment [assessed by vestibular-evoked myogenic potentials (VEMPs)] may be disease-specific also, possibly facilitating the differential diagnosis...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29664869/vestibular-manifestations-in-subjects-with-enlarged-vestibular-aqueduct
#5
Jae-Jin Song, Sung Kwang Hong, Sang Yeon Lee, Sung Joon Park, Seong Il Kang, Yong-Hwi An, Jeong Hun Jang, Ji Soo Kim, Ja-Won Koo
OBJECTIVE: To describe the results of a thorough evaluation in a large series of patients with an enlarged vestibular aqueduct (EVA), focusing on vestibular manifestations with etiological considerations. STUDY DESIGN: Retrospective chart review of patients with EVA. SETTING: Tertiary referral center. PATIENTS: A total of 22 EVA patients with a median age of 8 years (6 mo-35 yr) who underwent both audiovestibular and radiologic examinations...
April 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29658088/pathogenetic-role-of-endothelial-dysfunction-in-idiopathic-vestibulopathy
#6
E V Udut, P P Shchetinin, T V Rudenko, F Lucieer, H Kingma, A P Shchetinina, M O Pleshkov, V P Demkin, V V Udut
Comparative analysis of the groups of patients with idiopathic bilateral vestibular hypofunction and a group of vestibulopathy patients with vertebrobasilar insufficiency demonstrated identity of the basic and additional diagnostic parameters in these syndromes as well as similarity in clinical diagnostic and anamnesis data. In all cases, functional assessment of endothelium-dependent vasodilation and selected biochemical marker sICAM-1 revealed endothelial dysfunction. Drug correction of endothelial dysfunction positively affected the manifestations of major and minor features of the syndrome, which confirmed the contribution of endothelial functional disturbances to the pathogenesis of bilateral vestibular hypofunction...
April 16, 2018: Bulletin of Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29620655/clinical-characteristics-and-treatment-outcomes-in-camurati-engelmann-disease-a-case-series
#7
Yoon-Myung Kim, Eungu Kang, Jin-Ho Choi, Gu-Hwan Kim, Han-Wook Yoo, Beom Hee Lee
BACKGROUND: Camurati-Engelmann disease is an extremely rare disease characterized by hyperostosis of multiple long bones. This condition is caused by heterozygous mutations in the TGFB1 gene. METHODS: We describe the clinical and genetic characteristics of 4 Korean patients with this rare disease diagnosed at Asan Medical Center in Korea between June 2012 and May 2016, to increase awareness about this condition among general physicians and orthopedists. The presenting features, biochemical findings, radiographic and nuclear imaging findings, molecular analysis, and treatment outcomes of 4 patients were reviewed retrospectively...
April 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29572253/inframe-deletion-of-human-espn-is-associated-with-deafness-vestibulopathy-and-vision-impairment
#8
Zubair M Ahmed, Thomas J Jaworek, Gowri N Sarangdhar, Lili Zheng, Khitab Gul, Shaheen N Khan, Thomas B Friedman, Robert A Sisk, James R Bartles, Sheikh Riazuddin, Saima Riazuddin
BACKGROUND: Usher syndrome (USH) is a neurosensory disorder characterised by deafness, variable vestibular areflexia and vision loss. The aim of the study was to identify the genetic defect in a Pakistani family (PKDF1051) segregating USH. METHODS: Genome-wide linkage analysis was performed by using an Illumina linkage array followed by Sanger and exome sequencing. Heterologous cells and mouse organ of Corti explant-based transfection assays were used for functional evaluations...
March 23, 2018: Journal of Medical Genetics
https://www.readbyqxmd.com/read/29563049/noisy-vestibular-stimulation-increases-gait-speed-in-normals-and-in-bilateral-vestibulopathy
#9
Shinichi Iwasaki, Chisato Fujimoto, Naoya Egami, Makoto Kinoshita, Fumiharu Togo, Yoshiharu Yamamoto, Tatsuya Yamasoba
BACKGROUND: Galvanic vestibular stimulation delivered as zero-mean current noise (noisy GVS) has been shown to improve static and dynamic postural stability probably by enhancing vestibular information. OBJECTIVE: /Hypothesis: To examine the effect of an imperceptible level of noisy GVS on dynamic locomotion in normal subjects as well as in patients with bilateral vestibulopathy. METHODS: Walking performance of 19 healthy subjects and 12 patients with bilateral vestibulopathy at their preferred speed was examined during application of noisy GVS with an amplitude ranging from 0 to 1000 μA...
March 10, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29559948/amiodarone-a-newly-discovered-association-with-bilateral-vestibulopathy
#10
REVIEW
Robert Gürkov
Background: Bilateral vestibulopathy (BVP) is a debilitating disorder characterized by the hypofunction of both vestibular end organs or nerves. The most frequent identifiable causes of BVP are ototoxic drug effects, infectious and autoimmune disorders. However, the majority of cases remain idiopathic. Very recently, the first discovery of a clinical case of Amiodarone-associated BVP has been reported. Methods: An overview of the literature concerning the relation between amiodarone toxicity and BVP is presented and discussed...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29550655/precision-of-perceived-direction-of-gravity-in-partial-bilateral-vestibulopathy-correlates-with-residual-utricular-function
#11
A Bürgin, C J Bockisch, A A Tarnutzer
OBJECTIVE: Gait imbalance in patients with bilateral-vestibular-deficiency (BVD) was linked to increased variability in perceived direction of gravity while upright. We hypothesized this to be true also when roll-tilted. Moreover, as utricular input is essential for spatial orientation, we predicted the variability of perceived vertical to correlate inversely with utricular function. METHODS: Subjective visual vertical (SVV) and haptic vertical (SHV) were measured in various roll-orientations (0°/±45°/±90°) and postural adjustments along earth-vertical/earth-horizontal were collected in patients with partial BVD (n = 10) and healthy controls (n = 11)...
March 5, 2018: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29545765/clinical-characteristics-and-etiology-of-bilateral-vestibular-loss-in-a-cohort-from-central-illinois
#12
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/29536178/dizziness-in-europe-from-licensed-fitness-to-drive-to-licence-without-fitness-to-drive
#13
Doreen Huppert, Dominik Straumann, Mans Magnusson, Ilmari Pyykkö, Thomas Brandt
A common European Community driving licence was established in 1980. However, there are major differences among the countries as regards medical conditions that legally affect driving ability. This article discusses various assessment guidelines for dizzy patients. These range from a total absence of specified binding requirements in Finland or regulations open to clinical interpretation in Switzerland, to inappropriately strict regulations in Germany. We focus on requirements for patients with vestibular disorders in Germany which have been in force since 2014...
March 13, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29535671/predictive-capability-of-an-ipad-based-medical-device-me-d-x-for-the-diagnosis-of-vertigo-and-dizziness
#14
Katharina Feil, Regina Feuerecker, Nicolina Goldschagg, Ralf Strobl, Thomas Brandt, Albrecht von Müller, Eva Grill, Michael Strupp
Background: Making the correct diagnosis of patients presenting with vertigo and dizziness in clinical practice is often challenging. Objective: In this study we examined the performance of the iPad based program me d x in the prediction of different clinical vertigo and dizziness diagnoses and as a diagnostic tool to distinguish between them. Patients and methods: The data collection was done in the outpatient clinic of the German Center of Vertigo and Balance Disorders...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29508134/noisy-vestibular-stimulation-improves-vestibulospinal-function-in-patients-with-bilateral-vestibulopathy
#15
R Schniepp, J C Boerner, J Decker, K Jahn, T Brandt, Max Wuehr
OBJECTIVES: To examine the mechanism underlying previously reported ameliorating effects of noisy galvanic vestibular stimulation (GVS) on balance performance in patients with bilateral vestibulopathy (BVP) and determine those patients (incomplete versus complete vestibular loss) that might benefit from this intervention. METHODS: Vestibulospinal reflex thresholds were determined in 12 patients with BVP [2 with complete loss (cBVP) and 10 with residual function (rBVP)]...
March 5, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29508131/acute-vestibular-syndrome-clinical-head-impulse-test-versus-video-head-impulse-test
#16
Nese Celebisoy
HINTS battery involving head impulse test (HIT), nystagmus, and test of skew is the critical bedside examination to differentiate acute unilateral peripheral vestibulopathy from posterior circulation stroke (PCS) in acute vestibular syndrome (AVS). The highest sensitivity component of the battery has been reported to be the horizontal HIT, whereas skew deviation is defined as the most specific but non-sensitive sign for PCS. Video-oculography-based HIT (vHIT) may have an additional power in making the differentiation...
March 5, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29500503/-management-of-acute-vertigo-and-dizziness-patients-in-emergency-departments-in-germany
#17
J Löhler, D Eßer, B Wollenberg, L E Walther
BACKGROUND: Dizziness and vertigo are some of the most common reasons for seeking medical help. Acute dizziness and vertigo require interdisciplinary cooperation. New diagnostic methods (the video head impulse test) and modern algorithms (HINTS: head impulse test/nystagmus [direction changing]/test-of-skew) are increasingly used in case of the acute vestibular syndrome in emergency care. METHODS: In a survey on the management and participation of the ENT specialist area, the authors interviewed 168 German ENT clinics during the spring of 2017 using an online survey...
March 2, 2018: HNO
https://www.readbyqxmd.com/read/29493719/the-head-impulse-test-as-a-predictor-of-videonystagmography-caloric-test-lateralization-according-to-the-level-of-examiner-experience-a-prospective-open-label-study
#18
Ashraf Awadie, Yehuda Holdstein, Margalit Kaminer, Avi Shupak
We conducted a study to compare how well the head impulse test (HIT), without and with eye-movement recordings, would predict videonystagmographic (VNG) caloric test lateralization when performed by a resident and an experienced otoneurologist. This prospective, open-label, blinded study was conducted in an ambulatory tertiary care referral center. Our study population was made up of 60 patients-29 men and 31 women, aged 20 to 82 years (mean: 56.4 ± 11.4)-with peripheral vestibulopathy who underwent HIT and VNG caloric testing...
January 2018: Ear, Nose, & Throat Journal
https://www.readbyqxmd.com/read/29490911/recent-advances-in-head-impulse-test-findings-in-central-vestibular-disorders
#19
REVIEW
Jeong-Yoon Choi, Hyo-Jung Kim, Ji-Soo Kim
The head impulse test (HIT) is used to evaluate the vestibulo-ocular reflex (VOR) during a high-velocity head rotation. Corrective catch-up saccades that occur during or after the HITs usually indicate peripheral vestibular hypofunction, whereas in acute vestibular syndrome, normal clinical (bedside) HITs should prompt a search for a central lesion. However, recent quantitative studies that evaluated HITs using magnetic search coils or video-based techniques have demonstrated that specific patterns of HIT abnormalities are associated with central vestibular disorders...
March 27, 2018: Neurology
https://www.readbyqxmd.com/read/29483893/mathematical-methods-for-measuring-the-visually-enhanced-vestibulo-ocular-reflex-and-preliminary-results-from-healthy-subjects-and-patient-groups
#20
Jorge Rey-Martinez, Angel Batuecas-Caletrio, Eusebi Matiño, Gabriel Trinidad-Ruiz, Xabier Altuna, Nicolas Perez-Fernandez
Background: Visually enhanced vestibulo-ocular reflex (VVOR) is a well-known bedside clinical test to evaluate visuo-vestibular interaction, with clinical applications in patients with neurological and vestibular dysfunctions. Owing to recently developed diagnostic technologies, the possibility to perform an easy and objective measurement of the VVOR has increased, but there is a lack of computational methods designed to obtain an objective VVOR measurement. Objectives: To develop a method for the assessment of the VVOR to obtain a gain value that compares head and eye velocities and to test this method in patients and healthy subjects...
2018: Frontiers in Neurology
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