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https://www.readbyqxmd.com/read/27889628/effect-of-betel-nut-chewing-on-the-otolithic-reflex-system
#1
Chuan-Yi Lin, Yi-Ho Young
OBJECTIVE: This study investigated the effect of betel nut chewing on the otolithic reflex system. METHODS: Seventeen healthy volunteers without any experience of chewing betel nut (fresh chewers) and 17 habitual chewers underwent vital sign measurements, ocular vestibular-evoked myogenic potential (oVEMP), and cervical VEMP (cVEMP) tests prior to the study. Each subject then chewed two pieces of betel nut for 2min (dosing). The same paradigm was repeated immediately, 10min, and 20min after chewing...
October 13, 2016: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/27856148/evaluation-of-benign-paroxysmal-positional-vertigo-following-le-fort-i-osteotomy
#2
K Deniz, S S Akdeniz, A Ö Koç, S Uçkan, L N Ozluoğlu
The Le Fort I osteotomy is widely used to correct dentofacial deformities. Benign paroxysmal positional vertigo (BPPV) is a common vestibular end organ disorder characterized by short, often recurrent episodes of vertigo. Head trauma is one of the known causes of BPPV. During pterygoid osteotomy, the surgical trauma induced by percussion with the surgical mallet and osteotomes can displace otoliths into the semicircular canal, resulting in BPPV. The aim of this study was to evaluate the potential risk of occurrence of BPPV in individuals undergoing Le Fort I osteotomy...
November 14, 2016: International Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/27814311/effects-of-acoustic-stimulus-duration-on-cervical-vestibular-evoked-myogenic-potentials-a-neurophysiological-and-modeling-study
#3
A Ciardo, N El Assawy, S Mauro, L Priano
OBJECTIVE: To analyze and model the effects of acoustic stimulus duration on cervical vestibular evoked myogenic potentials (cVEMPs). DESIGN: Subjects with normal hearing and no vestibular or cervical disorders were tested using 1 kHz tone bursts (TBs) of different durations to evoke cVEMPs from the ipsilateral sternocleidomastoid muscle. VEMP modeling was performed in Labview. RESULTS: The increase in TB duration initially resulted in a non-linear increase in cVEMP amplitude, followed by more complex cVEMP modifications that were mainly related to the appearance of a new wave (nX) that interfered with n23...
November 3, 2016: Journal of Vestibular Research: Equilibrium & Orientation
https://www.readbyqxmd.com/read/27746761/vestibular-function-tests-for-vestibular-migraine-clinical-implication-of-video-head-impulse-and-caloric-tests
#4
Woo Seok Kang, Sang Hun Lee, Chan Joo Yang, Joong Ho Ahn, Jong Woo Chung, Hong Ju Park
Vestibular migraine (VM) is one of the most common causes of episodic vertigo. We reviewed the results of multiple vestibular function tests in a cohort of VM patients who were diagnosed with VM according to the diagnostic criteria of the Barany Society and the International Headache Society and assessed the efficacy of each for predicting the prognosis in VM patients. A retrospective chart analysis was performed on 81 VM patients at a tertiary care center from June 2014 to July 2015. Patients were assessed by the video head impulse test (vHIT), caloric test, vestibular-evoked myogenic potentials (VEMPs), and sensory organization test (SOT) at the initial visit and then evaluated for symptomatic improvement after 6 months...
2016: Frontiers in Neurology
https://www.readbyqxmd.com/read/27716603/do-vestibular-evoked-myogenic-potential-abnormalities-in-patients-with-cochlear-implant-only-reflect-saccular-dysfunction
#5
Hasan Demirhan, Muhammet Yıldız, Özgür Yiğit
OBJECTIVE: The objective of this study was to explore the usefulness of 1000-Hz tone burst (TB) stimuli for detecting cervical vestibular-evoked myogenic potential (cVEMP) abnormalities in patients with a cochlear implant (CI). MATERIALS AND METHODS: Thirty asymptomatic patients who received unilateral CI because of severe bilateral sensorineural hearing loss were assessed for cVEMP produced by TB stimuli at two frequencies (500 and 1000 Hz) in the airway. VEMPs were recorded when the devices were switched to the on (CI-on) and off (CI-off) positions...
August 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27716602/evaluation-of-the-vestibular-system-and-etiology-in-children-with-unilateral-sensorineural-hearing-loss
#6
Leman Birdane, Armağan İncesulu, Erkan Özüdoğru, Cemal Cingi, Hamdi Caklı, Melek Kezban Gürbüz, Baki Adapınar
OBJECTIVE: The aim of this study was to evaluate the vestibular system of children with unilateral sensorineural hearing loss (USNHL), investigate the etiological factors of USNHL and analyze whether a genetic predisposition exists. MATERIALS AND METHODS: Thirty-three children aged less than 18 years with USNHL, who visited the ear, nose, and throat (ENT) department between January 2004 and December 2012, were included in this study. Cases with conductive hearing loss were excluded from the study...
August 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27679562/stimulation-from-cochlear-implant-electrodes-assists-with-recovery-from-asymmetric-perceptual-tilt-evidence-from-the-subjective-visual-vertical-test
#7
Joshua J Gnanasegaram, William J Parkes, Sharon L Cushing, Carmen L McKnight, Blake C Papsin, Karen A Gordon
Vestibular end organ impairment is highly prevalent in children who have sensorineural hearing loss (SNHL) rehabilitated with cochlear implants (CIs). As a result, spatial perception is likely to be impacted in this population. Of particular interest is the perception of visual vertical because it reflects a perceptual tilt in the roll axis and is sensitive to an imbalance in otolith function. The objectives of the present study were thus to identify abnormalities in perception of the vertical plane in children with SNHL and determine whether such abnormalities could be resolved with stimulation from the CI...
2016: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/27666701/-characteristics-of-cervical-vestibular-evoked-myogenic-potential-in-different-test-positions
#8
X X Fu, B Liu, B E Qi, C Ji, J Z Guan
Objective: To investigate the characteristics of cervical vestibular evoked myogenic potential (cVEMP) of normal youth with different test positions, to study the relationship between test positions and test parameters, and to explore the suitable test position for clinical practice. Methods: Fifty healthy young volunteers (25 males, 25 females, 100 ears) were enrolled in this study. Two test positions were used, including sitting with the head turned away from the test (SIT) and supine with the head held straight up (SUP)...
September 7, 2016: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/27638068/vestibular-evoked-myogenic-potentials
#9
J G Colebatch, S M Rosengren, M S Welgampola
The vestibular-evoked myogenic potential (VEMP) is a short-latency potential evoked through activation of vestibular receptors using sound or vibration. It is generated by modulated electromyographic signals either from the sternocleidomastoid muscle for the cervical VEMP (cVEMP) or the inferior oblique muscle for the ocular VEMP (oVEMP). These reflexes appear to originate from the otolith organs and thus complement existing methods of vestibular assessment, which are mainly based upon canal function. This review considers the basis, methodology, and current applications of the cVEMP and oVEMP in the assessment and diagnosis of vestibular disorders, both peripheral and central...
2016: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/27624122/altered-processing-of-otolithic-information-in-isolated-lateral-medullary-infarction
#10
Hyo-Jung Kim, Seoyeon Kim, Jae Han Park, Ji-Soo Kim
Ocular and cervical vestibular-evoked myogenic potentials (VEMPs) evaluate the function of otolithic pathways in central as well as peripheral vestibular disorders. This study aimed to determine the associations and dissociations of otolithic dysfunction in lateral medullary infarction (LMI), the most well-known disorder of central vestibulopathy. At the Dizziness Clinic of a referral-based University Hospital, 45 patients with isolated LMI (28 men, mean age = 55.6 ± 12.5) had evaluation of the ocular tilt reaction (OTR), tilt of the subjective visual vertical (SVV), and ocular and cervical VEMPs from Janurary 2011 to August 2015 during the acute phase, 1-11 days from the symptom onset (median = 2 days)...
December 2016: Journal of Neurology
https://www.readbyqxmd.com/read/27609665/ocular-vestibular-evoked-myogenic-potential-testing-for-the-prognosis-of-bell-s-palsy
#11
Chul Won Yang, Sang Hoon Kim, Seung Geun Yeo, Moon Suh Park, Jae Yong Byun
CONCLUSION: oVEMP could be a useful tool for predicting the prognosis of Bell's palsy comparable to ENoG and H-B grade. OBJECTIVES: Several previous studies have reported cases of Bell's palsy with vestibular function disorder. The basic hypothesis behind this effect lies in the close proximity of the vestibular and facial nerves in the internal auditory canal (IAC). Therefore, the aim of this study was to investigate the correlation between Bell's palsy prognosis and ocular vestibular evoked myogenic potentials (oVEMPs)...
September 9, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27608722/end-point-indicators-of-low-dose-intra-tympanic-gentamicin-in-management-of-m%C3%A3-ni%C3%A3-re-s-disease
#12
Hong Liu, Ting Zhang, Qianru Wu, Yibo Zhang, Chunfu Dai
CONCLUSIONS: One-shot, low-dose intra-tympanic gentamicin (ITG) treatment was effective and safe for Ménière's disease (MD) patients. Head thrust test (HTT) and vestibular evoked myogenic potentials (VEMPs) test could be used as endpoint indicators for vertigo control in MD patients. OBJECTIVES: The present study is to explore end-point indicators of ITG injection in MD. METHODS: Patients with MD were reviewed from June 2012 to March 2014...
September 9, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27557910/vestibular-evoked-myogenic-potentials-in-vestibular-migraine-do-they-help-differentiating-from-meni%C3%A3-re-s-disease
#13
Aki Inoue, Naoya Egami, Chisato Fujimoto, Makoto Kinoshita, Tatsuya Yamasoba, Shinichi Iwasaki
OBJECTIVE: To investigate whether both cervical and ocular vestibular myogenic potentials (cVEMPs and oVEMPs) to air-conducted sound (ACS) and bone-conducted vibration (BCV) can help to differentiate vestibular migraine (VM) and Menière's disease (MD). STUDY DESIGN: Retrospective study. SETTINGS: A tertiary referral center. SUBJECTS AND METHODS: Twenty-eight patients with VM, 28 patients with definite unilateral MD, and 28 age-matched controls were included...
November 2016: Annals of Otology, Rhinology, and Laryngology
https://www.readbyqxmd.com/read/27553486/n-acetylcysteine-as-a-single-therapy-for-sudden-deafness
#14
Chao-Hsien Chen, Yi-Ho Young
CONCLUSION: Like NAC ameliorates hearing loss from acoustic trauma in the inner ear, NAC may also rescue hearing loss from sudden deafness confined to the inner ear. OBJECTIVE: This study assesses the effect of N-acetyl-L-cysteine (NAC) as a single therapy for sudden deafness. METHODS: Thirty-five sudden deafness patients with neither systemic disorders nor central signs in electronystagmography were treated with NAC alone and assigned to Group A...
August 24, 2016: Acta Oto-laryngologica
https://www.readbyqxmd.com/read/27525621/correlation-of-superior-canal-dehiscence-surface-area-with-vestibular-evoked-myogenic-potentials-audiometric-thresholds-and-dizziness-handicap
#15
Jacob B Hunter, Brendan P O'Connell, Jianing Wang, Srijata Chakravorti, Katie Makowiec, Matthew L Carlson, Benoit Dawant, Devin L McCaslin, Jack H Noble, George B Wanna
OBJECTIVE: To correlate objective measures of vestibular and audiometric function as well as subjective measures of dizziness handicap with the surface area of the superior canal dehiscence (SCD). STUDY DESIGN: Retrospective chart review and radiological analysis. SETTING: Single tertiary academic referral center. PATIENTS: Preoperative computed tomography imaging, patient survey, audiometric thresholds, and vestibular evoked myogenic potential (VEMP) testing in patients with confirmed SCD...
September 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27498399/vestibular-dependent-inter-stimulus-interval-effects-on-sound-evoked-potentials-of-central-origin
#16
N P M Todd, S Govender, J G Colebatch
Todd et al. (2014ab) have recently demonstrated the presence of vestibular-dependent contributions to auditory evoked potentials (AEPs) when passing through the vestibular threshold as determined by vestibular evoked myogenic potentials (VEMPs), including a particular deflection labeled as an N42/P52 prior to the long-latency AEPs N1 and P2. In this paper we report the results of an experiment to determine the effect of inter-stimulus interval (ISI) and regularity on potentials recorded above and below VEMP threshold...
August 3, 2016: Hearing Research
https://www.readbyqxmd.com/read/27466890/vestibular-impairment-in-dementia
#17
Aisha Harun, Esther S Oh, Robin T Bigelow, Stephanie Studenski, Yuri Agrawal
OBJECTIVE: Recent studies suggest an association between vestibular and cognitive function. The goal of the study was to investigate whether vestibular function was impaired in individuals with mild cognitive impairment (MCI) and Alzheimer's disease (AD) compared with cognitively normal individuals. STUDY DESIGN: Cross-sectional study. SETTING: Outpatient memory clinic and longitudinal observational study unit. PATIENTS: Older individuals ≥55 years with MCI or AD...
September 2016: Otology & Neurotology
https://www.readbyqxmd.com/read/27422626/utilisation-of-multi-frequency-vemps-improves-diagnostic-accuracy-for-meniere-s-disease
#18
Rebecca Maxwell, Claudia Jerin, Robert Gürkov
To determine whether vestibular evoked myogenic potential (VEMP) measurements that combine the VEMP 500/1000 Hz frequency tuning ratio and the inter-aural asymmetry ratio can reliably detect unilateral Meniere's disease ears as compared to healthy controls. Forty-two consecutive patients with certain unilateral Meniere's disease (as confirmed using a locally enhanced inner ear MRI (LEIM)) were assessed. Cervical vestibular evoked myogenic potentials (cVEMP) and ocular vestibular evoked myogenic potentials (oVEMP) were recorded at 500 and 1000 Hz...
July 15, 2016: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/27397722/evaluation-of-vestibular-evoked-myogenic-potentials-vemp-and-electrocochleography-for-the-diagnosis-of-m%C3%A3-ni%C3%A3-re-s-disease
#19
Pauliana Lamounier, Thiago Silva Almeida de Souza, Debora Aparecida Gobbo, Fayez Bahmad
INTRODUCTION: Ménière's disease (MD) is an inner ear disorder characterized by episodic vertigo, tinnitus, ear fullness, and fluctuating hearing. Its diagnosis can be especially difficult in cases where vestibular symptoms are present in isolation (vestibular MD). The definitive diagnosis is made histologically and can only be performed post-mortem, after analysis of the temporal bone. Endolymphatic hydrops is a histopathological finding of the disease and occurs more often in the cochlea and saccule, followed by the utricle and semicircular canals...
June 2, 2016: Brazilian Journal of Otorhinolaryngology
https://www.readbyqxmd.com/read/27382687/-clinical-characteristics-of-100-vestibular-migraine-cases
#20
Jincheng Chen, Degui Gong, Shuhe Cai, Ziming Wu, Xingjian Lin, Xiaoyan Ma, Liqun Yu
OBJECTIVE: To analyze the characteristics of vestibular migraine (VM), in order to understand the auditory and vestibular function. METHOD: One hundred cases of confirmed or suspected VM patients were observed. Routine examination including pure tone test, vestibular dual temperature test and vestibular evoked myogenic potential(VEMP) and video head impulse test(v-HIT) Were conducted. RESULT: The incidence of male and female was about 1.00 : 2...
March 2016: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
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