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Vestibular testing

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https://www.readbyqxmd.com/read/28434022/effects-of-vestibular-disorders-on-vestibular-reflex-and-imagery
#1
B S Cohen, J Provasi, P Leboucher, I Israël
The aim of this study was to establish the effect of vestibular lesion on vestibular imagery. Subjects were required to estimate verbally their passively travelled rotation angles in complete darkness, i.e., to activate vestibular imagery. During motion, the vestibulo-ocular reflex (VOR) was measured. Thus, we examined the coherence between the vestibulo-ocular reflex and self-rotation imagery, with vestibular-lesioned patients and healthy participants. Unilateral acute and chronic patients, bilateral patients, and healthy subjects were compared...
April 22, 2017: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/28429801/the-dizzy-patient-don-t-forget-disorders-of-the-central-vestibular-system
#2
REVIEW
Thomas Brandt, Marianne Dieterich
Vertigo and dizziness are among the most common complaints in neurology clinics, and they account for about 13% of the patients entering emergency units. In this Review, we focus on central vestibular disorders, which are mostly attributable to acute unilateral lesions of the bilateral vestibular circuitry in the brain. In a tertiary interdisciplinary outpatient dizziness unit, central vestibular disorders, including vestibular migraine, comprise about 25% of the established diagnoses. The signs and symptoms of these disorders can mimic those of peripheral vestibular disorders with sustained rotational vertigo...
April 21, 2017: Nature Reviews. Neurology
https://www.readbyqxmd.com/read/28424655/sustained-and-transient-vestibular-systems-a-physiological-basis-for-interpreting-vestibular-function
#3
REVIEW
Ian S Curthoys, Hamish G MacDougall, Pierre-Paul Vidal, Catherine de Waele
Otolithic afferents with regular resting discharge respond to gravity or low-frequency linear accelerations, and we term these the static or sustained otolithic system. However, in the otolithic sense organs, there is anatomical differentiation across the maculae and corresponding physiological differentiation. A specialized band of receptors called the striola consists of mainly type I receptors whose hair bundles are weakly tethered to the overlying otolithic membrane. The afferent neurons, which form calyx synapses on type I striolar receptors, have irregular resting discharge and have low thresholds to high frequency (e...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28422031/the-importance-of-labyrinthine-examination-in-the-prognosis-and-therapy-for-balance-in-spinocerebellar-ataxia
#4
João Henrique Faryniuk, Bianca Simone Zeigelboim, Hélio Afonso Ghizoni Teive, Vinicius Ribas Fo, Paulo Breno Noronha Liberalesso, Jair Mendes Marques
INTRODUCTION: Spinocerebellar ataxias (SCAs) are a heterogeneous group of neurodegenerative diseases that are characterized by the presence of progressive cerebellar ataxia. OBJECTIVE: Identify vestibular disorders and demonstrate the importance of labyrinthine examination in the prognosis and therapy for balance in patients with SCAs. MATERIALS AND METHODS: The study had a retrospective cross-sectional design and evaluated 57 patients, mean age of 41...
April 19, 2017: International Tinnitus Journal
https://www.readbyqxmd.com/read/28421873/facial-alveolar-bone-width-at-the-first-and-second-maxillary-premolars-in-healthy-patients-a-cone-beam-computed-tomography-study
#5
Julio Rojo, José Viña, David Peñarrocha, Miguel Peñarrocha
The purpose was to analyze the thickness of the facial alveolar bone at the first and second maxillary premolars and determinate the percentage of premolars that reached 2 mm in width. A retrospective study analyzing cone beam computed tomography scans from the database of the Oral Surgery Unit of the University of Valencia was performed. Patients with periodontal disease, orthodontic treatment, absence among the first maxillary molars, premolars with endodontic treatment and/or prosthetic restorations were excluded...
April 19, 2017: Journal of Oral Implantology
https://www.readbyqxmd.com/read/28421258/-intralabyrinthine-schwannomas-surgical-management-and-hearing-rehabilitation-with-cochlear-implants-german-version
#6
S K Plontke, T Rahne, M Pfister, G Götze, C Heider, N Pazaitis, C Strauss, P Caye-Thomasen, S Kösling
Intralabyrinthine schwannomas (ILS) are a rare differential diagnosis of sudden hearing loss and vertigo. In an own case series of 12 patients, 6 tumors showed an intracochlear, 3 an intravestibular, 1 a transmodiolar including the cerebello-pontine angle (CPA), 1 a transotic including the CPA and 1 a multilocular location. The tumors were removed surgically in 9 patients, whereas 3 patients opted for a "wait-and-test-and-scan" strategy. Of the surgical patients, 3 underwent labyrinthectomy and cochlear implant (CI) surgery in a single stage procedure; 1 patient received extended cochleostomy with CI surgery; 3 underwent partial or subtotal cochleoectomy, with partial cochlear reconstruction and CI surgery (n = 1) or implantation of electrode dummies for possible later CI following repeated MRI follow-up (n = 2); and in 2 patients, the tumors of the internal auditory canal and cerebellopontile angle exhibiting transmodiolar or transmacular growth were removed by combined translabyrinthine-transotic resection...
April 18, 2017: HNO
https://www.readbyqxmd.com/read/28421034/is-the-headache-in-patients-with-vestibular-migraine-attenuated-by-vestibular-rehabilitation
#7
Nagisa Sugaya, Miki Arai, Fumiyuki Goto
BACKGROUND: Vestibular rehabilitation is the most effective treatment for dizziness due to vestibular dysfunction. Given the biological relationship between vestibular symptoms and headache, headache in patients with vestibular migraine (VM) could be improved by vestibular rehabilitation that leads to the improvement of dizziness. This study aimed to compare the effects of vestibular rehabilitation on headache and other outcomes relating to dizziness, and the psychological factors in patients with VM patients, patients with dizziness and tension-type headache, and patients without headache...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28420320/pediatric-non-vestibular-schwannoma
#8
Cory Broehm, Alyaa Al-Ibraheemi, Karen J Fritchie
While the clinicopathologic features of pediatric vestibular schwannomas, often in the context of neurofibromatosis type 2 (NF2), have been well studied, there is less data regarding the characteristics of pediatric non-vestibular schwannomas (NVS). Additionally, the rate of loss of SMARCB1/INI1 expression in this population has not been systematically evaluated. Our institutional archives were searched for cases of NVS arising in patients 18 years or younger. Clinicopathologic features including SMARCB1/INI1 status were assessed for each case...
January 1, 2017: Pediatric and Developmental Pathology
https://www.readbyqxmd.com/read/28419063/the-effect-of-elevated-intracranial-pressure-on-frequency-tuning-of-air-conducted-ocular-vestibular-myogenic-potentials-in-m%C3%A3-ni%C3%A3-re-s-disease-patients
#9
Rebecca Maxwell, Claudia Jerin, Robert Gürkov
OBJECTIVE: To investigate the effect of increased intracranial pressure on ocular vestibular-evoked myogenic potential (oVEMP) amplitudes and frequency tuning in patients with Ménière's disease (MD) to elucidate whether oVEMPS recorded under such conditions could provide a simple and accurate diagnostic test for MD. SETTING: Tertiary referral center for otology and neurotology. PATIENTS: Ten patients with certain unilateral MD (mean age = 48...
April 17, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28409725/genetic-landscape-of-sporadic-vestibular-schwannoma
#10
Aril Løge Håvik, Ove Bruland, Erling Myrseth, Hrvoje Miletic, Mads Aarhus, Per-Morten Knappskog, Morten Lund-Johansen
OBJECTIVE Vestibular schwannoma (VS) is a benign tumor with associated morbidities and reduced quality of life. Except for mutations in NF2, the genetic landscape of VS remains to be elucidated. Little is known about the effect of Gamma Knife radiosurgery (GKRS) on the VS genome. The aim of this study was to characterize mutations occurring in this tumor to identify new genes and signaling pathways important for the development of VS. In addition, the authors sought to evaluate whether GKRS resulted in an increase in the number of mutations...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28397265/mri-surveillance-of-vestibular-schwannomas-without-contrast-enhancement-clinical-and-economic-evaluation
#11
Daniel H Coelho, Yang Tang, Brian Suddarth, Mohammed Mamdani
OBJECTIVES: To determine if high-resolution T2-weighted (HRT2) magnetic resonance imaging (MRI) is a comparably accurate and economical alternative to the gold standard of contrast-enhanced T1-weighted (T1C) MRI for surveillance of know vestibular schwannomas (VSs). STUDY DESIGN: Retrospective case-control analysis, systematic review, and economic evaluation. METHODS: Vestibular schwannoma size in anteroposterior, mediolateral, and superoinferior axes were measured by two neuroradiologists, both blinded to previous measurements, for 50 randomized patients with T1C and HRT2 on two separate occasions...
April 11, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28397037/assessment-of-balance-and-vestibular-functions-in-patients-with-idiopathic-sudden-sensorineural-hearing-loss
#12
Jia Liu, Ren-Hong Zhou, Bo Liu, Yang-Ming Leng, Jing-Jing Liu, Dong-Dong Liu, Su-Lin Zhang, Wei-Jia Kong
This study investigated the relationship among the severity of hearing impairment, vestibular function and balance function in patients with idiopathic sudden sensorineural hearing loss (ISSNHL). A total of 35 ISSNHL patients (including 21 patients with vertigo) were enrolled. All of the patients underwent audiometry, sensory organization test (SOT), caloric test, cervical vestibular-evoked myogenic potential (cVEMP) test and ocular vestibular-evoked myogenic potential (oVEMP) test. Significant relationship was found between vertigo and hearing loss grade (P=0...
April 2017: Journal of Huazhong University of Science and Technology. Medical Sciences
https://www.readbyqxmd.com/read/28397001/gait-ataxia-in-humans-vestibular-and-cerebellar-control-of-dynamic-stability
#13
Roman Schniepp, Ken Möhwald, Max Wuehr
During human locomotion, vestibular feedback control is fundamental for maintaining dynamic stability and adapting the gait pattern to external circumstances. Within the supraspinal locomotor network, the cerebellum represents the key site for the integration of vestibular feedback information. The cerebellum is further important for the fine-tuning and coordination of limb movements during walking. The aim of this review article is to highlight the shared structural and functional sensorimotor principles in vestibular and cerebellar locomotion control...
April 10, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/28395493/-light-cupulopathy-persistent-direction-changing-positional-nystagmus-with-a-null-plane
#14
S J Wang, H Jiang, Z Q Gao, H Y Wu
Objective: The purpose of this study was to report two cases of light cupulopathy, and describe the characteristics of these cases and analysis the possible physiopathological mechanisms. Methods: The histories, clinical features, characteristics of nystagmus, and vestibular function, as well as audiologic results of the two patients with light cupula were analyzed. Results: The two patients showed persistent geotropic direction changing positional nystagmus(DCPN)in the supine head roll tests. The null plane was present when the head was turn slightly towards affected side...
March 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28395491/-the-significance-of-directional-preponderance-in-the-evaluation-of-vestibular-function-in-patients-with-vertigo
#15
J Wang, Y J Zhou, J Yu, J Gu
Objective: To analyze the relationship between directional preponderance (DP), spontaneous nystagmus(SN) and vestibular disorders, and to investigate the significance of DP in directing peripheral vestibular function in patients with vertigo. Methods: This was a retrospective analysis of 394 cases diagnosed with peripheral vestibular disease accompanied by vertigo from March 2012 to June 2014 in the Outpatient Department of the Eye & ENT Hospital of Fudan University. Results of static and dynamic posture equilibrium tests, SN, unilateral weakness(UW), and DP in videonystagmography(VNG) were analyzed and compared...
March 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28395490/-pilot-study-on-the-functional-evaluation-of-vestibular-otolith-organ-pathway-in-the-stage-of-patients-with-meniere-disease
#16
X R Niu, P Han, Z C Chen, Y Z Zhang, Y Gao, Y Cheng, J Hu, Y Xu, Q Zhang, M Xu
Objective: To observe the features of air-conducted sound elicited ocular vestibular-evoked myogenic potential(ACS-oVEMP) and cervical vestibular-evoked myogenic potential(ACS-cVEMP) in patients with Meniere disease (MD). To analyze the relationship between air-conducted sound elicited vestibular-evoked myogenic potentials (ACS-VEMP) responses and clinical stages of disease, as well as its clinical application of cervical and ocular vestibular evoked myogenic potentials in MD. Method: Fifty six patients with MD and 50 normal subjects (100 ears) were recruited for conventional cVEMP and oVEMP examinations...
March 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28391531/efficacy-of-steroid-therapy-based-on-symptomatic-and-functional-improvement-in-patients-with-vestibular-neuritis-a-prospective-randomized-controlled-trial
#17
Myung Hoon Yoo, Chan Joo Yang, Shin Ae Kim, Marn Joon Park, Joong Ho Ahn, Jong Woo Chung, Hong Ju Park
The aim of this study was to examine the efficacy of methylprednisolone in vestibular neuritis (VN) by objective and subjective measures. This prospective controlled randomized study was conducted at one tertiary hospital. Twenty-nine VN patients were randomized to either the steroid (n = 15) or the control (n = 14) group. The steroid group received methylprednisolone for 2 weeks, whereas control patients did not; both groups underwent regular vestibular exercises and were prescribed a Ginkgo biloba...
April 8, 2017: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/28390809/magnetic-resonance-imaging-predicts-chronic-dizziness-after-benign-paroxysmal-positional-vertigo
#18
Wang Woon Cha, Kudamo Song, In Kyu Yu, Myoung Su Choi, Dong Sik Chang, Chin-Saeng Cho, Ho Yun Lee
OBJECTIVES: We aimed to evaluate the clinical implications of magnetic resonance imaging (MRI) findings in patients with benign paroxysmal positional vertigo (BPPV). METHODS: A total of 120 patients diagnosed with BPPV completed MRI at the emergency room between December 2012 and June 2015 and met our criteria for inclusion in this study. Epidemiologic characteristics, the results of audio-vestibular testing, and MRI findings were retrospectively analyzed. RESULTS: The most common findings were white matter hyperintensities (70...
April 4, 2017: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/28388854/auditory-adaptation-testing-as-a-tool-for-investigating-tinnitus-origin-two-patients-with-vestibular-schwannoma
#19
Carol A Silverman, Shlomo Silman, Michele B Emmer
OBJECTIVE: To enhance the understanding of tinnitus origin by disseminating two case studies of vestibular schwannoma (VS) involving behavioural auditory adaptation testing (AAT). DESIGN: Retrospective case study. STUDY SAMPLE: Two adults who presented with unilateral, non-pulsatile subjective tinnitus and bilateral normal-hearing sensitivity. At the initial evaluation, the otolaryngologic and audiologic findings were unremarkable, bilaterally...
April 7, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28387693/visual-vestibular-processing-deficits-in-mild-traumatic-brain-injury
#20
W G Wright, R T Tierney, J McDevitt
BACKGROUND: The search for reliable and valid signs and symptoms of mild traumatic brain injury (mTBI), commonly synonymous with concussion, has lead to a growing body of evidence that individuals with long-lasting, unremitting impairments often experience visual and vestibular symptoms, such as dizziness, postural and gait disturbances. OBJECTIVE: Investigate the role of visual-vestibular processing deficits following concussion. METHODS: A number of clinically accepted vestibular, oculomotor, and balance assessments as well as a novel virtual reality (VR)-based balance assessment device were used to assess adults with post-acute concussion (n = 14) in comparison to a healthy age-matched cohort (n = 58)...
2017: Journal of Vestibular Research: Equilibrium & Orientation
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