608 results match your criteria Vestibuloocular Reflex Testing


Suppression Head Impulse Paradigm (SHIMP) in evaluating the vestibulo-saccadic interaction in patients with vestibular neuritis.

Eur Arch Otorhinolaryngol 2020 May 29. Epub 2020 May 29.

Fondazione Santa Lucia IRCCS, Rome, Italy.

Purpose: Evaluate the potential clinical application of the Suppression Head Impulse Paradigm (SHIMP) in evaluating the vestibulo-saccadic interaction in patients with vestibular neuritis (VN).

Methods: A retrospective study was performed. Fifteen patients diagnosed with unilateral VN were identified from a database of ENT vestibular clinic from January 2011 to February 2020. Read More

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http://dx.doi.org/10.1007/s00405-020-06085-6DOI Listing

Association of acute vestibular/ocular motor screening scores to prolonged recovery in collegiate athletes following sport-related concussion.

Brain Inj 2020 May 21;34(6):840-845. Epub 2020 Apr 21.

Department of Orthopaedic Surgery, University of Pittsburgh , Pittsburgh, Pennsylvania, USA.

Introduction: Researchers have yet to explore the association of acute (i.e., within 3 days) post-injury VOMS scores and length of time until clearance to return to play in collegiate athletes. Read More

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http://dx.doi.org/10.1080/02699052.2020.1755055DOI Listing

Retinal Image Slip Must Pass the Threshold for Human Vestibulo-Ocular Reflex Adaptation.

J Assoc Res Otolaryngol 2020 Mar 30. Epub 2020 Mar 30.

Balance and Vision Laboratory, Neuroscience Research Australia, Cnr Barker Street & Easy Street Randwick, Sydney, NSW, 2031, Australia.

We sought to determine whether repeated vestibulo-ocular reflex (VOR) adaptation training to increase the VOR gain (eye/head velocity) had a lasting effect in normal subjects and whether there was a retinal image slip tolerance threshold for VOR adaptation. We used the unilateral incremental VOR adaptation technique and horizontal active (self-generated, predictable) head impulses as the vestibular stimulus. Both active and passive (imposed, unpredictable) head impulse VOR gains were measured before and after unilateral incremental VOR adaptation training. Read More

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http://dx.doi.org/10.1007/s10162-020-00751-6DOI Listing

An Algorithm for the Diagnosis of Vestibular, Cerebellar, and Oculomotor Disorders Using a Systematized Clinical Bedside Examination.

Cerebellum 2020 Mar 16. Epub 2020 Mar 16.

Laboratory of Vestibular Neuroadaptation, Department of Otolaryngology Head and Neck Surgery and Department of Physical Medicine and Rehabilitation, The Johns Hopkins University School of Medicine, Broadway, MD, USA.

The bedside examination associated with their clinical history remains the most critical means to accurately diagnose the cause for most of the signs and symptoms related to pathology of the cerebellum and vestibular system in patients presenting with dizziness and imbalance. This paper focuses on those critical bedside examinations, suggests when laboratory testing might be useful to confirm the clinical suspicion, and considers the shared neural circuitry within the visual and vestibular systems to offer an algorithmic approach in conducting the clinical bedside examination. Read More

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http://dx.doi.org/10.1007/s12311-020-01124-8DOI Listing

Evidence a shared mechanism mediates ipsi- and contralesional compensatory saccades and gait after unilateral vestibular deafferentation.

J Neurophysiol 2020 Apr 11;123(4):1486-1495. Epub 2020 Mar 11.

Laboratory of Vestibular NeuroAdaptation, Department of Otolaryngology - Head and Neck Surgery, The Johns Hopkins University School of Medicine, Baltimore, Maryland.

The study objective was to understand how the contralesional labyrinth contributes to gaze and gait stability after unilateral vestibular deafferentation (UVD). Head impulse testing (vHIT) was completed in 37 individuals [22 women (59%); age 52.13 ± 11. Read More

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http://dx.doi.org/10.1152/jn.00585.2019DOI Listing

Improvement After Vestibular Rehabilitation Not Explained by Improved Passive VOR Gain.

Front Neurol 2020 20;11:79. Epub 2020 Feb 20.

Department of Physical Medicine and Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, United States.

Gaze stability exercises are a critical component of vestibular rehabilitation for individuals with vestibular hypofunction and many studies reveal the rehabilitation improves functional performance. However, few studies have examined the vestibular physiologic mechanisms (semicircular canal; otolith) responsible for such recovery after patients with vestibular hypofunction complete gaze and gait stability exercises. The purpose of this study was to compare behavioral outcome measures (i. Read More

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http://dx.doi.org/10.3389/fneur.2020.00079DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7044341PMC
February 2020

Evaluation of Semicircular Canal Function by Video Head Impulse Test in Patients With Facial Nerve Schwannoma.

Otol Neurotol 2020 Jun;41(5):e615-e622

Department of Otolaryngology-Head & Neck Surgery, Faculty of Medicine and Graduate School of Medicine, Hokkaido University.

Objectives: The aim of the present study was to evaluate semicircular canal function by video Head Impulse Test (vHIT) in patients with facial nerve schwannoma (FNS).

Study Design: Retrospective case review.

Setting: Tertiary referral center. Read More

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http://dx.doi.org/10.1097/MAO.0000000000002591DOI Listing

Oculomotor functions in focal dystonias: A systematic review.

Acta Neurol Scand 2020 May 12;141(5):359-367. Epub 2020 Feb 12.

Department of Neurology, University Hospital (Inselspital) and University of Bern, Bern, Switzerland.

Focal Dystonia (FD) is a chronic neurological disorder, which causes twisting and repetitive movements and abnormal postures induced by involuntary sustained contractions of agonist and antagonist muscles. Based on the hypothesis that several dystonia-related brain regions, including cerebellum, are implicated in oculomotor disturbances (OCD), a number of studies investigated oculomotor function in patients with dystonia. However, conceptual clarity with respect to the used assessment tools and interpretation of the findings is lacking in the literature. Read More

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http://dx.doi.org/10.1111/ane.13224DOI Listing

Mental tasking and rotary Chair-Induced vestibular nystagmus utilizing Video-Oculography.

Int J Audiol 2020 May 26;59(5):360-366. Epub 2019 Dec 26.

Department of Audiology and Speech Pathology, University of Tennessee Health Science Center, Knoxville, TN, USA.

To investigate whether the use of mental tasking, when compared to no mental task, affects measurement of nystagmus response with regard to gain, phase & symmetry, and artefact when utilising video-oculography (VOG) as the measurement technique in rotary chair testing (RCT). A within-subject repeated-measures design was utilised. Seventeen (17) healthy adults were evaluated (age 22-25 years). Read More

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http://dx.doi.org/10.1080/14992027.2019.1706768DOI Listing

Case Report: Bilateral Horizontal Gaze Palsy (1 + 1 Syndrome): A Supranuclear Gaze Palsy.

Optom Vis Sci 2019 12;96(12):898-904

Significance: A rare case of bilateral horizontal gaze palsy with intact vertical gaze eye movements and largely intact vestibulo-ocular reflex is presented owing to demyelinating lesions of the patient's bilateral paramedian pontine reticular formations and left infranuclear abducens nerve from the patient's recently diagnosed multiple sclerosis.

Purpose: The purpose of this study was to report on a rare case of bilateral horizontal gaze palsy from a supranuclear lesion in a patient with a recent diagnosis of multiple sclerosis.

Case Report: A 43-year-old African American woman presented urgently for evaluation of her inability to move her eyes into either horizontal gaze. Read More

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http://dx.doi.org/10.1097/OPX.0000000000001453DOI Listing
December 2019

Bilateral Vestibular Hypofunction in the Time of the Video Head Impulse Test.

Audiol Neurootol 2020 11;25(1-2):72-78. Epub 2019 Dec 11.

Department of Otorhinolaryngology, Clínica Universidad de Navarra, Pamplona, Spain.

Objectives: Bilateral vestibulopathy is a clinical syndrome in which laboratory testing plays a crucial diagnostic role. We aimed to establish the frequency of detection of that finding in a tertiary level hospital considering the new methods of laboratory vestibular examination nowadays in use, with respect to the conventional caloric and rotatory chair test approaches.

Design: Two similar time periods (5 years) were retrospectively evaluated, and the demographic, clinical data and test results from 4,576 patients were reviewed. Read More

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http://dx.doi.org/10.1159/000504286DOI Listing
December 2019

Video head impulse test in children with otitis media with effusion and dizziness.

Int J Pediatr Otorhinolaryngol 2020 Feb 18;129:109783. Epub 2019 Nov 18.

Ankara Education and Research Hospital, Clinic of Otolaryngology Sakarya Mh. Ulucanlar Street No 89 Altındağ, Ankara, Turkey. Electronic address:

Objective: The objectives of the study were to evaluate the vestibular impairment in children with otitis media with effusion (OME) and dizziness by using vHIT test, and to compare their results with healthy children.

Methods: The study population consisted of 30 pediatric patients with OME and dizziness and 30 healthy children, age between 4 and 15. Otoscopic and tympanometric examination and vHIT testing were performed to all subjects. Read More

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http://dx.doi.org/10.1016/j.ijporl.2019.109783DOI Listing
February 2020

Gauging the effectiveness of canal occlusion surgery: how I do it.

J Laryngol Otol 2019 Oct 31:1-5. Epub 2019 Oct 31.

Department of Otolaryngology - Head and Neck Surgery, Toronto General Hospital, University Health Network, University of Toronto, Canada.

Background: Transmastoid occlusion of the posterior or superior semicircular canal is an effective and safe management option in patients with refractory benign paroxysmal positional vertigo or symptomatic superior semicircular canal dehiscence. A method of quantifying successful canal occlusion surgery is described.

Methods: This paper presents representative patients with intractable benign paroxysmal positional vertigo or symptomatic superior semicircular canal dehiscence, who underwent transmastoid occlusion of the posterior or superior semicircular canal respectively. Read More

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http://dx.doi.org/10.1017/S0022215119002032DOI Listing
October 2019

Altered Resting-State Functional Connectivity in Wernicke's Encephalopathy With Vestibular Impairment.

Front Neurol 2019 27;10:1035. Epub 2019 Sep 27.

Department of Neurology, Ludwig-Maximilians-University, Munich, Germany.

To reveal the neural basis of Wernicke's encephalopathy (WE) with impaired vestibulo-ocular reflex (VOR), we evaluated resting-state functional connectivity (rs-fc) in the vestibular processing brain regions. Rs-fc between the vestibular regions and the rest of the brain were compared with neurotological features including the head-impulse tests (vHIT) and caloric responses in patients with WE ( = 5, mean age 53.4 ± 10 years) and healthy controls ( = 20, mean age 55. Read More

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http://dx.doi.org/10.3389/fneur.2019.01035DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6776602PMC
September 2019
6 Reads

Biasing the semicircular canal cupula in excitatory direction decreases the gain of the vestibuloocular reflex for head impulses.

J Vestib Res 2019 ;29(6):281-286

Department of Otolaryngology, Karl Landsteiner University Hospital Krems, Krems an der Donau, Austria.

Background: It has been shown that cold caloric irrigation decreases the vestibulo-ocular reflex (VOR) gain in the vertically positioned lateral canal as measured by head impulse testing. This effect is most probably caused by a sustained deflection of the cupula in the inhibitory direction.

Objective: The aim of the present experiment was to answer the question if a sustained excitatory deflection increases the gain of the reflex in healthy volunteers. Read More

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http://dx.doi.org/10.3233/VES-190681DOI Listing
January 2019
1 Read

Is Cerebellar Ataxia, Neuropathy, and Vestibular Areflexia Syndrome (CANVAS) a Vestibular Ganglionopathy?

J Int Adv Otol 2019 Aug;15(2):304-308

Department of Neurology, Northwestern University, Chicago, USA.

Objectives: CANVAS is an acronym for cerebellar ataxia, neuropathy and vestibular areflexia syndrome. Limited autopsy data has suggested that CANVAS is caused by a focal dorsal root ganglionopathy that damages Scarpa's (vestibular) ganglion, but spares the Spiral (hearing) ganglion. If the vestibular areflexia of CANVAS is in fact due to ganglionopathy, then there should be global reduction of all vestibular responses. Read More

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http://dx.doi.org/10.5152/iao.2019.7068DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6750782PMC

Reducing the number of impulses in video head impulse testing - It's the quality not the numbers.

Int J Pediatr Otorhinolaryngol 2019 Oct 9;125:206-211. Epub 2019 Aug 9.

Vestibular Research Laboratory, School of Psychology, The University of Sydney, Sydney, NSW, Australia.

Objectives: The video-Head-Impulse-Test (vHIT) is widely used to evaluate vestibular function. Nevertheless, there is no consensus on the necessary or ideal number of impulses performed for robust VOR gains. Therefore, the aim of our study is to analyze how many impulses are needed to receive reliable VOR gains in difficult testing situations like testing children younger than 48 months and in children with vestibular loss. Read More

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http://dx.doi.org/10.1016/j.ijporl.2019.07.013DOI Listing
October 2019

Vestibulo-Ocular Reflex Function in Adolescents With Sport-Related Concussion: Preliminary Results.

Sports Health 2019 Nov/Dec;11(6):479-485. Epub 2019 Aug 14.

Department of Physical Therapy, University of Pittsburgh, Pittsburgh, Pennsylvania.

Background: Oculomotor impairments, dizziness, and imbalance are common after sports-related concussion (SRC) in adolescents and suggest a relationship between SRC and vestibular system dysfunction. However, it is not clear whether the source of these problems is attributable to the peripheral or central vestibular system.

Hypothesis: The video Head Impulse Test (vHIT), which assesses peripheral vestibular function, will show differences in gain between adolescents with and without SRC. Read More

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http://dx.doi.org/10.1177/1941738119865262DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6822204PMC
December 2019
4 Reads

Corrective Saccades in Unilateral and Bilateral Vestibular Hypofunction During Slow Rotation Expressed by Visually Enhanced VOR and VOR Suppression: Role of the Cerebellum.

Cerebellum 2019 Aug 8. Epub 2019 Aug 8.

Preceptor of ENT Residency Program, PUC-RS, Porto Alegre, Brazil.

In clinical practice, the head impulse test paradigm (HIMP) and the suppression head impulse paradigm (SHIMP) stimulate high-frequency head movements so that the visual system is temporarily suppressed. The two tests could also be useful tools for vestibular assessment at low frequencies: VVOR (visually enhanced vestibulo-ocular reflex) and VORS (vestibulo-ocular reflex suppression). The aim of this study is to analyze the eye movements typically found during VVOR and VORS testing in patients with unilateral and bilateral vestibular hypofunction. Read More

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http://dx.doi.org/10.1007/s12311-019-01066-wDOI Listing
August 2019
2 Reads

Reference ranges and stability of auditory and vestibular measures in a comprehensive assessment battery for traumatic brain injury.

Undersea Hyperb Med 2019 BIMA Special Edition No. Feb;46(3):227-241

Division of Hyperbaric Medicine, Intermountain Medical Center, Murray, Utah and Intermountain LDS Hospital, Salt Lake City, Utah U.S.

Background: Audiology clinics have many tools available to evaluate auditory and vestibular complaints. However, many tools lack established normative ranges across the life span. We conducted this study to establish reference ranges across the life span for audiology/vestibular measures commonly used to evaluate patients with traumatic brain injury. Read More

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November 2019
4 Reads

Effects of Immersive Virtual Reality Headset Viewing on Young Children: Visuomotor Function, Postural Stability, and Motion Sickness.

Am J Ophthalmol 2020 01 1;209:151-159. Epub 2019 Aug 1.

St Louis Children's Hospital at Washington University Medical Center, St Louis, Missouri, USA.

Purpose: To assess the safety of VR 3D headset (virtual reality 3-dimensional binocular-stereoscopic near-eye display) use in young children. Product safety warnings that accompany VR headsets ban their use in children under age 13 years.

Design: Prospective, interventional, before-and-after study. Read More

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http://dx.doi.org/10.1016/j.ajo.2019.07.020DOI Listing
January 2020
4 Reads

Human vestibulo-ocular reflex adaptation is frequency selective.

J Neurophysiol 2019 09 24;122(3):984-993. Epub 2019 Jul 24.

Balance and Vision Laboratory, Neuroscience Research Australia, Sydney, Australia.

The vestibulo-ocular reflex (VOR) is the only system that maintains stable vision during rapid head rotations. The VOR gain (eye/head velocity) can be trained to increase using a vestibular-visual mismatch stimulus. We sought to determine whether low-frequency (sinusoidal) head rotation during training leads to changes in the VOR during high-frequency head rotation testing, where the VOR is more physiologically relevant. Read More

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http://dx.doi.org/10.1152/jn.00162.2019DOI Listing
September 2019
3 Reads

Gentamicin vestibulotoxicity with modern systemic dosing regimens: a prospective study using video-oculography.

Acta Otolaryngol 2019 Sep 16;139(9):759-768. Epub 2019 Jul 16.

d Brandenburg University of Technology Cottbus - Senftenberg, Universitaetsplatz 1 , Senftenberg , Germany.

To determine the incidence of gentamicin vestibulotoxicity with current dosing regimens, and to evaluate the feasibility of routine video-oculography on all patients given gentamicin. In this prospective incidence study serial horizontal vestibulo-ocular reflex (HVOR) gain measurements were recorded using video-oculography on adult inpatients receiving intravenous gentamicin. The primary outcome was the proportion of patients developing impairment of their HVOR gain. Read More

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http://dx.doi.org/10.1080/00016489.2019.1637935DOI Listing
September 2019
4 Reads

Presbyvestibulopathy: Diagnostic criteria Consensus document of the classification committee of the Bárány Society.

J Vestib Res 2019;29(4):161-170

Department of Neurology and German Center for Vertigo, Ludwig Maximilians University, Munich, Germany.

This paper describes the diagnostic criteria for presbyvestibulopathy (PVP) by the Classification Committee of the Bárány Society. PVP is defined as a chronic vestibular syndrome characterized by unsteadiness, gait disturbance, and/or recurrent falls in the presence of mild bilateral vestibular deficits, with findings on laboratory tests that are between normal values and thresholds established for bilateral vestibulopathy.The diagnosis of PVP is based on the patient history, bedside examination and laboratory evaluation. Read More

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http://dx.doi.org/10.3233/VES-190672DOI Listing
January 2019
4 Reads

No Evidence of a Contribution of the Vestibular System to Frequent Falls in Progressive Supranuclear Palsy.

J Clin Neurol 2019 Jul;15(3):339-346

Department of Neurology, Ludwig Maximilians University, Munich, Germany.

Background And Purpose: Conflicting results about vestibular function in progressive supranuclear palsy (PSP) prompted a systematic examination of the semicircular canal function, otolith function, and postural stability.

Methods: Sixteen patients with probable PSP [9 females, age=72±6 years (mean±SD), mean disease duration=3.6 years, and mean PSP Rating Scale score=31] and 17 age-matched controls were examined using the video head impulse test, caloric testing, ocular and cervical vestibular evoked myogenic potentials (o- and cVEMPs), video-oculography, and posturography. Read More

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http://dx.doi.org/10.3988/jcn.2019.15.3.339DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6620443PMC
July 2019
4 Reads

Functional Testing of Vestibulo-Spinal Contributions to Balance Control: Insights From Tracking Improvement Following Acute Bilateral Peripheral Vestibular Loss.

Front Neurol 2019 28;10:550. Epub 2019 May 28.

Division of Audiology and Neurootology, Department of Otorhinolaryngology (ORL), University Hospital Basel, Basel, Switzerland.

A battery of stance and gait tasks can be used to quantify functional deficits and track improvement in balance control following peripheral vestibular loss. An improvement could be due to at least 3 processes: partial peripheral recovery of sensory responses eliciting canal or otolith driven vestibular reflexes; central compensation of vestibular reflex gains, including substitution of intact otolith responses for pathological canal responses; or sensory substitution of visual and proprioceptive inputs for vestibular contributions to balance control. We describe the presumed action of all 3 processes observed for a case of sudden incapacitating acute bilateral peripheral loss probably due to vestibular neuritis. Read More

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http://dx.doi.org/10.3389/fneur.2019.00550DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6546919PMC
May 2019
5 Reads

[Preliminary study on age stability of VOR gain values of video head impulse test in healthy subjects].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019 May;33(5):393-397

Department of Otorhinolaryngology Head and Neck Surgery, PLA General Hospital No.6 Medical Center, Beijing, 100048, China.

To explore the age stability of the video head impulse test(vHIT) in healthy subjects. This was a prospective study on healthy subjects referred to our department. One hundred and eighty healthy subjects(age range 21-80) without any current or previous history of brain disorder, vertigo, neck stiffness or eye diseases participated in this study and the vHIT was carried out in all 180 cases. Read More

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http://dx.doi.org/10.13201/j.issn.1001-1781.2019.05.003DOI Listing
May 2019
5 Reads

Functional Head Impulse Test in Professional Athletes: Sport-Specific Normative Values and Implication for Sport-Related Concussion.

Front Neurol 2019 30;10:387. Epub 2019 Apr 30.

Department of Neurology, University of Zurich, Zurich, Switzerland.

Dizziness, slow visual tracking, or blurred vision following active head (or body) movements are among the most common symptoms reported following sport-related concussion, often related to concurrent dysfunctions of the vestibular system. In some cases, symptoms persist even if bedside and auxiliary standard vestibular tests are unremarkable. New functional tests have been developed in recent years to objectify neurological alterations that are not captured by standard tests. Read More

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http://dx.doi.org/10.3389/fneur.2019.00387DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6509415PMC
April 2019
4 Reads

Test-Retest Reliability of Video Head Impulse Test in Healthy Individuals and Individuals with Dizziness.

J Am Acad Audiol 2019 10 17;30(9):744-752. Epub 2019 Apr 17.

Department of Audiology, All India Institute of Speech and Hearing, Mysore, India.

Background: Video head impulse test (vHIT) is widely accepted as a test for the assessment of functional integrity of semicircular canals (SCCs). It allows for the evaluation of the functioning of all six SCCs independent of each other. It works on the principle of the vestibulo-ocular reflex (VOR). Read More

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https://www.ingentaconnect.com/content/10.3766/jaaa.17080
Publisher Site
http://dx.doi.org/10.3766/jaaa.17080DOI Listing
October 2019
11 Reads

It is not your eyes.

Surv Ophthalmol 2020 Jul - Aug;65(4):487-493. Epub 2019 Apr 19.

Department of Neurology and Neurosurgery, The John Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Ophthalmology, The John Hopkins University School of Medicine Baltimore, Maryland, USA; Department of Otolaryngology - Head and Neck Surgery, The John Hopkins University School of Medicine, Baltimore, Maryland, USA; Department of Emergency Medicine, The John Hopkins University School of Medicine, Baltimore, Maryland, USA.

A 55-year-old woman reported blurred vision while walking, numbness and tingling, contact allodynia, and gait imbalance. Visual acuity was 20/20 in both eyes, but there was a loss of 4 lines with horizontal dynamic visual acuity testing. Ocular motility examination demonstrated spontaneous downbeat nystagmus that increased in lateral gaze with a torsional component and impaired smooth pursuits. Read More

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http://dx.doi.org/10.1016/j.survophthal.2019.04.004DOI Listing
April 2019
6 Reads

A review on screening tests for vestibular disorders.

Authors:
Helen S Cohen

J Neurophysiol 2019 07 17;122(1):81-92. Epub 2019 Apr 17.

Bobby R. Alford Department of Otolaryngology - Head and Neck Surgery, Baylor College of Medicine , Houston, Texas.

Although many studies have reported on tests of the vestibular system a valid and reliable, evidence-based screening battery for easy clinical use remains elusive. Many screening tests attempt to assess the vestibulo-ocular reflex. Therefore, head shaking, the Dix-Hallpike maneuver, the supine roll test, and head impulse tests are discussed. Read More

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https://www.physiology.org/doi/10.1152/jn.00819.2018
Publisher Site
http://dx.doi.org/10.1152/jn.00819.2018DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6689777PMC
July 2019
23 Reads

Angular vestibuloocular reflex responses in Otop1 mice. I. Otolith sensor input is essential for gravity context-specific adaptation.

J Neurophysiol 2019 06 10;121(6):2291-2299. Epub 2019 Apr 10.

Balance and Vision Laboratory, Neuroscience Research Australia, Sydney, New South Wales , Australia.

The role of the otoliths in mammals in the angular vestibuloocular reflex (VOR) has been difficult to determine because there is no surgical technique that can reliably ablate them without damaging the semicircular canals. The Otopetrin1 (Otop1) mouse lacks functioning otoliths because of failure to develop otoconia but seems to have otherwise normal peripheral anatomy and neural circuitry. By using these animals we sought to determine the role of the otoliths in angular VOR baseline function and adaptation. Read More

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http://dx.doi.org/10.1152/jn.00811.2018DOI Listing
June 2019
3 Reads

Vestibular Testing-Rotary Chair and Dynamic Visual Acuity Tests.

Adv Otorhinolaryngol 2019 15;82:39-46. Epub 2019 Jan 15.

The human vestibular system is exquisitely sensitive to detect linear and rotational head acceleration signals, processed in the brainstem and subsequently relayed to the extraocular motor neurons to generate a compensatory eye rotation. This vestibulo-ocular reflex (VOR) ensures clear and stable vision during head rotation, enabling humans to keep gaze on their desired target. In this chapter, we describe the rotary chair - one physiologic measure of the VOR, and the dynamic visual acuity (DVA) test - one behavioral measure of the VOR. Read More

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http://dx.doi.org/10.1159/000490270DOI Listing
December 2019
8 Reads

Video Head Impulse Testing.

Adv Otorhinolaryngol 2019 15;82:56-66. Epub 2019 Jan 15.

The bedside head impulse, first described nearly 20 years ago, is the single most useful clinical test of the human vestibulo-ocular reflex (VOR). The video head impulse test (vHIT), its laboratory counterpart, now enables the objective assessment of the VOR. We examine how the vHIT can be utilized in three common clinical scenarios: the acute vestibular syndrome, recurrent spontaneous vertigo, and chronic imbalance. Read More

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http://dx.doi.org/10.1159/000490272DOI Listing
December 2019
10 Reads

Video-head impulse test results in patients with Menière's disease related to duration and stage of disease.

J Vestib Res 2018 ;28(5-6):401-407

Apeldoorn Dizziness Centre, Gelre Hospital, Apeldoorn, The Netherlands.

Background: The video-head impulse test employs the vestibulo-ocular reflex (VOR) to assess vestibular function. To this day, no consensus has been reached among scientists in terms of whether or not vHIT results change in MD patients as the disease progresses.

Objective: To assess whether the vHIT is more often abnormal in later stages of MD compared to earlier stages. Read More

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http://dx.doi.org/10.3233/VES-190654DOI Listing
November 2019
2 Reads

[Functional vestibulo-ocular reflex test].

Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019 Mar;33(3):213-215;219

In recent years, the diagnosis and treatment of vertigo and balance disorders have become a hot topic of multidisciplinary attention. The evaluation method of vestibular function has also been improved, providing important evidence for the diagnosis and differential diagnosis of vertigo related diseases. Vestibular rehabilitation is one of the important methods for the treatment of vertigo diseases. Read More

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http://dx.doi.org/10.13201/j.issn.1001-1781.2019.03.007DOI Listing
March 2019
4 Reads

Clinical Validity of Quantified Visually Enhanced Vestibulo-ocular Reflex Test to Detect Horizontal Semicircular Canal Hypofunction.

Otol Neurotol 2019 03;40(3):365-371

Neurolotlogy Unit, ENT Department.

Objective: To investigate the clinical validity of the mathematical measured VVOR test results to detect horizontal semicircular canal hypofunction.

Study Design: Prospective, nonrandomized, observational study.

Setting: Tertiary referral center, hospital. Read More

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http://dx.doi.org/10.1097/MAO.0000000000002090DOI Listing
March 2019
16 Reads

Competence of final year otolaryngology residents with the bedside head impulse test.

J Otolaryngol Head Neck Surg 2019 Jan 18;48(1). Epub 2019 Jan 18.

Department of Otolaryngology - Head & Neck Surgery, University of Ottawa, Ottawa, Canada.

Background: The bedside head impulse test (bHIT) is a clinical method of assessing the vestibulo-ocular reflex (VOR). It is a critical component of the bedside assessment of dizzy patients, and can help differentiate acute stroke from vestibular neuritis. However, there is evidence showing the bHIT is often not performed in appropriate clinical settings or is performed poorly. Read More

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http://dx.doi.org/10.1186/s40463-019-0326-yDOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6339336PMC
January 2019
5 Reads

[Cerebellar ataxia with neuropathy and vestibular areflexia syndrome (CANVAS): a case report].

Rinsho Shinkeigaku 2019 Jan 29;59(1):27-32. Epub 2018 Dec 29.

Department of Neurology, National Hospital Organization Minamikyushu National Hospital.

Cerebellar ataxia with neuropathy and vestibular areflexia syndrome (CANVAS) is a rare form of multisystem ataxia defined by a triad of cerebellar impairment, bilateral vestibular hypofunction, and somatosensory deficit. Here we present a patient with CANVAS. A 76-year-old woman whose parents were cousins had noted slowly worsening gait imbalance since age 67. Read More

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http://dx.doi.org/10.5692/clinicalneurol.cn-001209DOI Listing
January 2019
10 Reads

Surgery-free video-oculography in mouse models: enabling quantitative and short-interval longitudinal assessment of vestibular function.

Neurosci Lett 2019 03 28;696:212-218. Epub 2018 Dec 28.

Department of Biomedical Engineering, Southern University of Science and Technology, Shenzhen, Guangdong 518055, China. Electronic address:

Vestibulo-ocular reflex (VOR) responding to acceleration stimuli is originated from the vestibular apparatuses and thus widely used as an in vivo indicator of the vestibular function. We have developed a vestibular function testing (VFT) system that allows to evaluate VOR response with improved efficiency. The previously required surgical procedure has been avoided by using a newly designed animal-immobility setup. Read More

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https://linkinghub.elsevier.com/retrieve/pii/S03043940183088
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http://dx.doi.org/10.1016/j.neulet.2018.12.036DOI Listing
March 2019
9 Reads
2.055 Impact Factor

Veterans have greater variability in their perception of binocular alignment.

PLoS One 2018 26;13(12):e0209622. Epub 2018 Dec 26.

War Related Illness and Injury Study Center, Department of Veteran Affairs, NJ, United States of America.

Introduction: A significant population of our wounded veterans suffer long-term functional consequences of visual deficit, disorientation, dizziness, and an impaired ability to read. These symptoms may be related to damage within the otolith pathways that contribute to ocular alignment. The purpose of this study was to compare perception of vertical and torsional ocular alignment between veterans and healthy controls in an upright and supine test position. Read More

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0209622PLOS
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6306227PMC
May 2019
27 Reads
3.234 Impact Factor

The Gaze Stabilization Test Following Concussion.

J Am Acad Audiol 2018 Nov 29. Epub 2018 Nov 29.

Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA.

Background: Concussion can cause vestibular dysfunction and oculomotor abnormalities which can lead to dizziness and protracted recovery time. There are few clinically useful, functional measures of the vestibulo-ocular reflex (VOR) post-concussion.

Purpose: The purpose of this study was to examine the gaze stabilization test (GST) in those referred for vestibular physical therapy following concussion, to determine the association between GST and other measures of recovery following concussion, and to examine the effect of demographic variables on GST performance. Read More

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https://www.ingentaconnect.com/content/10.3766/jaaa.18015
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http://dx.doi.org/10.3766/jaaa.18015DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6586524PMC
November 2018
28 Reads

Assessment of vision in concussion.

Curr Opin Neurol 2019 02;32(1):68-74

Department of Neurology.

Purpose Of Review: To review emerging vision-based assessments in the evaluation of concussion.

Recent Findings: Involvement of the visual pathways is common following concussion, the mildest form of traumatic brain injury. The visual system contains widely distributed networks that are prone to neurophysiologic changes after a concussion, resulting in visual symptoms and ocular motor dysfunction. Read More

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http://dx.doi.org/10.1097/WCO.0000000000000654DOI Listing
February 2019
30 Reads

Superficial Siderosis of the Central Nervous System: Neurotological Findings Related to Magnetic Resonance Imaging.

Otol Neurotol 2019 01;40(1):31-37

Department of Otorhinolaryngology, Head and Neck Surgery, Inselspital, Bern University Hospital, University of Bern, Switzerland.

Objective: To compare the neurotological results of five patients suffering from progressive hearing loss and ataxia due to superficial siderosis (SS) with the magnetic resonance imaging (MRI) findings.

Study Design: Retrospective case review.

Setting: Primary and hospital care center. Read More

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http://Insights.ovid.com/crossref?an=00129492-900000000-9657
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http://dx.doi.org/10.1097/MAO.0000000000002071DOI Listing
January 2019
19 Reads

Vertical head impulse and caloric are complementary but react opposite to Meniere's disease hydrops.

Laryngoscope 2019 07 4;129(7):1660-1666. Epub 2018 Dec 4.

Department of Otolaryngology, University of Tokushima School of Medicine, Tokushima, Japan.

Objectives/hypothesis: Meniere's disease (MD) patients can show normal head impulses despite poor caloric test results. This study aimed to investigate the discrepancy in the vestibulo-ocular reflex (VOR) in MD patients and whether endolymphatic hydrops (EH) influence the VOR.

Study Design: Prospective, cross-sectional observational study. Read More

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http://dx.doi.org/10.1002/lary.27580DOI Listing
July 2019
47 Reads

Differences in video head impulse test gains from right versus left or outward versus inward head impulses.

Laryngoscope 2019 07 4;129(7):1675-1679. Epub 2018 Dec 4.

Department of Otorhinolaryngology-Head and Neck Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Republic of Korea.

Objective: To investigate the effect of the right/left and outward/inward head impulses on video head impulse test (vHIT) gains.

Methods: Video head impulse test gains were calculated by recording the right eye movements with an infrared camera in a cohort of 24 healthy subjects (26-39 years old, 30 ± 9 years old). We compared the vHIT gains in four different situations in which the right and left lateral semicircular canals (LSCC) were stimulated through outward or inward head impulses. Read More

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http://dx.doi.org/10.1002/lary.27607DOI Listing
July 2019
7 Reads

Functional Head Impulse Testing Might Be Useful for Assessing Vestibular Compensation After Unilateral Vestibular Loss.

Front Neurol 2018 19;9:979. Epub 2018 Nov 19.

Department of Clinical Sciences Lund, Faculty of Medicine, Skåne University Hospital, Lund University, Lund, Sweden.

Loss of the vestibulo-ocular reflex (VOR) affects visual acuity during head movements. Previous studies have shown that compensatory eye-saccades improve visual acuity and that the timing of the saccade is important. Most of the tests involved in testing VOR are made with passive head movement, that do not necessarily reflect the activities of daily living and thus not being proportionate to symptoms and distresses of the patients. Read More

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http://dx.doi.org/10.3389/fneur.2018.00979DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6252383PMC
November 2018
43 Reads

Effect of Intensity Level and Speech Stimulus Type on the Vestibulo-Ocular Reflex.

J Am Acad Audiol 2019 10 15;30(9):792-801. Epub 2018 Nov 15.

Department of Audiology and Speech Pathology, University of Tennessee Health Science Center, Knoxville, TN.

Background: Accurate vestibulo-ocular reflex (VOR) measurement requires control of extravestibular suppressive factors such as visual fixation. Although visual fixation is the dominant suppressor and has been extensively studied, the mechanisms underlying suppression from nonvisual factors of attention and auditory stimulation are less clear. It has been postulated that the nonvisual suppression of the VOR is the result of one of two mechanisms: (1) activation of auditory reception areas excites efferent pathways to the vestibular nuclei, thus inhibiting the VOR or (2) cortical modulation of the VOR results from directed attention, which implies a nonmodality-specific process. Read More

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http://dx.doi.org/10.3766/jaaa.18016DOI Listing
October 2019
19 Reads

Enhanced Vestibulo-Ocular Reflex Responses on vHIT. Is It a Casual Finding or a Sign of Vestibular Dysfunction?

Front Neurol 2018 15;9:866. Epub 2018 Oct 15.

Vestibular Research Laboratory, School of Psychology, The University of Sydney, Sydney, NSW, Australia.

In current clinical practice, when in response to vHIT testing the observed slow-phase eye-velocity responses are significantly higher than head velocity, the most probable cause is considered to be an inadequate collection method or a recording artifact. We present two cases with clinical diagnoses of Menière's Disease: for both cases, enhanced eye velocity responses were measured with a rigorous vHIT testing protocol. In the first case we measured these enhanced responses on each test performed during a 5 year time series; in the second case multiple measurements were obtained from a patient after the radiologic diagnosis of vestibulo-cochlear hydrops. Read More

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https://www.frontiersin.org/article/10.3389/fneur.2018.00866
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http://dx.doi.org/10.3389/fneur.2018.00866DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6196253PMC
October 2018
41 Reads