Test-retest reliability of vestibular autorotation testing in healthy subjects

Guyot, Jean-Philippe; Psillas, Georges

doi:10.1016/s0194-5998(97)70057-3

Cited by 16 publications

(9 citation statements)

References 19 publications

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“…19,77 The increased gain does not appear to be explained by the COR. 74,78 The test-retest reliability of active horizontal head rotation at higher frequencies was poor in one study, 67 a finding at odds with a previous report. 79 There have been inconsistencies in vertical VOR measurements as well.…”

Section: Active Head Rotational Testing (Ahr) (Patient-generated Rotmentioning

confidence: 62%

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Assessment: Vestibular testing techniques in adults and children [RETIRED]

Fife¹,

Tusa²,

Furman³

et al. 2000

Neurology

218

110

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Overview. Neurologists are frequently called upon to evaluate patients with vertigo and dizziness and, in some cases, to make sense of abnormal vestibular tests. Consequently, it is useful to have some familiarity with the methods used to test vestibular function.The vestibulo-ocular reflex (VOR) is a reflex that acts at short latency to generate eye movements that compensate for head rotations in order to preserve clear vision during locomotion. The VOR is the most accessible gauge of vestibular function. Evaluating the VOR requires application of a vestibular stimulus and measurement of the resulting eye movements.This report reviews the advantages and limitations of the methods of stimulating the vestibular system: caloric irrigation, rotational chair testing, and auto-rotational testing. Vestibular testing in children is given additional consideration because of the paucity of recent reviews on the topic. This report will not address eye movement recording techniques, the neurophysiology of the VOR, which is reviewed elsewhere, 1,2 or interpretation of nystagmus.Literature review. This evidence-based assessment was developed from a review of published articles obtained through the MEDLINE database of the National Library of Medicine. Relevant publications were rated by the strength of evidence according to a scheme approved by the Therapeutics and Technology Assessment Subcommittee of the American Academy of Neurology (see Appendix 2).

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Section: Active Head Rotational Testing (Ahr) (Patient-generated Rotmentioning

confidence: 62%

“…57,[64][65][66][67] Normative data. Normative data on AHR is limited and has resulted in some conflicting results that correlate poorly among institutions and equipment.…”

Section: Active Head Rotational Testing (Ahr) (Patient-generated Rotmentioning

confidence: 99%

Assessment: Vestibular testing techniques in adults and children [RETIRED]

Fife¹,

Tusa²,

Furman³

et al. 2000

Neurology

218

110

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“…Specifically, head movement may have induced symptoms that made them reluctant to increase their frequency or they may not have been physically able to produce head movements of sufficient frequency secondary to motor planning problems or musculoskeletal limitations of the cervical spine despite having grossly normal range of motion. As noted by Guyott and Psillas, 27 it is possible that the inability to generate consistent high-frequency head movements was related to subject stress, fatigue, or lack of cooperation; however, these factors, including symptom level, motor planning, and limitations in spinal mobility or coordination, were not quantified.…”

Section: Discussionmentioning

confidence: 99%

“…16,22,24 -31 However, varying levels of reliability have been reported in samples from normal populations. [26][27][28]31 The purposes of this study were to establish the intrarater and interrater reliability of the VAT in a clinical sample of individuals reporting dizziness and to determine what factors may affect reliability. Specifically, we were interested in determining (1) what proportion of subjects can perform six consecutive VAT trials across the full range of head movement frequencies and (2) what specific characteristic differences exist between those subjects who are able to produce VAT data for six trials and those who are not.…”

Section: Introductionmentioning

confidence: 99%

The Reliability of the Vestibular Autorotation Test (VAT) in Patients with Dizziness

Blatt

Schubert

Roach

et al. 2008

Journal of Neurologic Physical Therapy

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Objective-To establish intrarater and interrater reliability of the Vestibular Autorotation Test (VAT) (Western Systems Research Inc., Pasadena, CA) in a clinical sample of individuals reporting dizziness.Study Design-Ninety-eight patients with reports of dizziness referred for vestibular function testing performed repeated trials of horizontal VAT. A subsample of 49 individuals repeated the test for a second rater.Results-Approximately 66% of subjects were unable to meet the performance criterion of six consecutive trials where data was displayed at frequencies ≥3. Conclusions-Many patients had difficulty performing the VAT. The reliability estimates for phase and asymmetry, but not gain, were significantly affected by practice. Careful attention to patient preparation, instruction, and test monitoring including sufficient patient practice before data collection are likely to be critical factors to ensure quality data.

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“…The harmonic acceleration test may be performed while keeping the eyes on a fixed visual target [16], or in total darkness. The test may also be performed with the head moving freely from side to side (active head movement) or with the head fixed to the rotating chair (passive head movement).…”

Section: The Rotational Testmentioning

confidence: 99%

Caloric and Rotational Testing: Merits, Pitfalls and Myths

Katsarkas

Smith

Galiana³

2001

Otorhinolaryngol Nova

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Objectives: The evaluation of the caloric and the rotational tests in the light of contemporary data on the function and dysfunction of the vestibular system. This is attempted by using novel engineering system notions. Material and Patients: Our work in mathematical modeling of the vestibuloocular reflex. In addition, our data from thousands of patients submitted to caloric testing and more than one hundred patients submitted to rotational testing. Methods: Analysis of results in light of system engineering notions. Results and Conclusions: The caloric test, corresponding to low head velocity and movement frequency, is an excellent test in defining the degree of excitability of one side versus the other. If there is a bilateral loss of vestibular function both, right and left, caloric responses will be compromised. However, the definition of the dynamic condition of the system and the detection of nonlinearities, especially in the presence of pathology, require rotational tests, which will yield such information if data are appropriately processed. Present day knowledge is insufficient on: (1) the functional contribution of the fast phase of nystagmus, (2) the synergistic effects of semicircular canals and otoliths, and (3) the synergistic effects of vestibular and other sensory modalities.

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Test-retest reliability of vestibular autorotation testing in healthy subjects

Cited by 16 publications

References 19 publications

Assessment: Vestibular testing techniques in adults and children [RETIRED]

Assessment: Vestibular testing techniques in adults and children [RETIRED]

The Reliability of the Vestibular Autorotation Test (VAT) in Patients with Dizziness

Caloric and Rotational Testing: Merits, Pitfalls and Myths

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