Video ocular counter roll: A bedside test of otolith‐ocular function

Yang, Yuchen; Tian, Jing; Otero‐Millan, Jorge; Kheradmand, Amir

doi:10.1002/acn3.51921

Cited by 4 publications

(6 citation statements)

References 7 publications

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“…Common clinical tests for evaluation of otolith function include (i) the vestibular evoked myogenic potentials (VEMP) [16], (ii) the video ocular counter-roll (vOCR) [17], (iii) measurement of the torsional eye position or ocular torsion using fundus photography [18], and (iv) the tests of subjective visual vertical (SVV) or horizontal (SVH) for assessment of perceived direction of gravity [19]. Other less common tests are off-axis rotation (OVAR) [20,21] and translational VOR (tVOR) [22].…”

Section: Clinical Evaluation Of the Otolith Organsmentioning

confidence: 99%

“…The static OCR has a normal gain (eye position divided by head position) of about 0.15 that can be measured using a video oculographic method known as the vOCR [17] (Figure 1). While the vOCR is a test of torsional VOR, measurement of ocular torsion with the head upright can be used to evaluate otolith-ocular tone balance [25].…”

Section: Clinical Evaluation Of the Otolith Organsmentioning

confidence: 99%

“…As a test of utricular-ocular function, vOCR demonstrates a sensitivity level comparable to VEMP in detecting vestibular loss [49]. However, unlike VEMP responses, vOCR deficits often recover after vestibular injury [17,30,50]. With acute vestibular loss, vOCR is mainly reduced on the affected side, but there is a symmetrical reduction on both sides with chronic vestibular loss [49,50].…”

Section: Comparisons Of Clinical Tests Of Otolith Functionmentioning

confidence: 99%

See 2 more Smart Citations

Focused Update on Clinical Testing of Otolith Organs

Hegemann,

Bery,

Kheradmand

2024

Preprint

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The overall contribution of otolith receptors to eye movements, postural control and perceptual functions is the basis for clinical testing of otolith function. With such wide range of contributions, it is important to recognize that the functional outcomes of these tests may vary depending on the specific method employed to stimulate the hair cells. In this article, we review common methods used for clinical evaluation of otolith function and how different aspects of physiology may affect the functional measurements in these tests. We compare the properties and performance of various clinical tests with the emphasis on the newly-developed video ocular counter roll (vOCR), measurement of ocular torsion on fundus photography, and subjective visual vertical or horizontal (SVV/SVH) testing.

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Section: Clinical Evaluation Of the Otolith Organsmentioning

confidence: 99%

Section: Clinical Evaluation Of the Otolith Organsmentioning

confidence: 99%

Section: Comparisons Of Clinical Tests Of Otolith Functionmentioning

confidence: 99%

See 1 more Smart Citation

Focused Update on Clinical Testing of Otolith Organs

Hegemann,

Bery,

Kheradmand

2024

Preprint

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show abstract

“…Common clinical tests for the evaluation of otolith function include (i) the vestibular evoked myogenic potentials (VEMP) [ 16 ], (ii) the video ocular counter roll (vOCR) [ 17 ], (iii) measurement of the torsional eye position or ocular torsion using fundus photography [ 18 ], and (iv) the tests of subjective visual vertical (SVV) or horizontal (SVH) for the assessment of perceived direction of gravity [ 19 ] ( Table 1 ). Other less-common tests are off-axis rotation (OVAR) [ 20 , 21 ] and translational VOR (tVOR) [ 22 ].…”

Section: Clinical Evaluation Of the Otolith Organsmentioning

confidence: 99%

“…During the static head tilt, however, the OCR is driven primarily by inputs from the utricle [ 24 ]. The static OCR has a normal gain (eye position divided by head position) of about 0.15 that can be measured using a video oculographic method known as the vOCR [ 17 ] ( Figure 1 ).…”

Section: Clinical Evaluation Of the Otolith Organsmentioning

confidence: 99%

Focused Update on Clinical Testing of Otolith Organs

Hegemann,

Bery,

Kheradmand

2024

Audiology Research

Self Cite

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Sensing gravity through the otolith receptors is crucial for bipedal stability and gait. The overall contribution of the otolith organs to eye movements, postural control, and perceptual functions is the basis for clinical testing of otolith function. With such a wide range of contributions, it is important to recognize that the functional outcomes of these tests may vary depending on the specific method employed to stimulate the hair cells. In this article, we review common methods used for clinical evaluation of otolith function and discuss how different aspects of physiology may affect the functional measurements in these tests. We compare the properties and performance of various clinical tests with an emphasis on the newly developed video ocular counter roll (vOCR), measurement of ocular torsion on fundus photography, and subjective visual vertical or horizontal (SVV/SVH) testing.

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Investigation of Video Ocular Counter-Roll Findings According to Head and Body Tilt Positions in Healthy Subjects

Kartal Özcan,

Satici,

Akbulut

et al. 2024

Ear &Amp; Hearing

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Objectives: A vestibulo-ocular reflex called the ocular counter-roll can be used to assess how well the otolith organs are functioning. The video ocular counter-roll (vOCR) test is a recent addition to the videonystagmography test battery that allows for video recording and quantitative ocular counter-roll analysis. The purpose of this study is to investigate potential discrepancies in vOCR measurements obtained from a 30° lateral head tilt in the roll plane versus measurements obtained from a 30° tilt of the head and body. Design: Thirty otologically, and neurologically healthy subjects aged 18 to 30 (M = 23.32 years, SD = 2.66 years; 8 men, 22 women) participated in this study. Pure-tone audiometry, oculomotor tests, and vOCR evaluation were performed for all participants. The vOCR assessment was performed in 2 positions, 30° lateral head tilt, and 30° body tilt position. The degree of static vOCR eye position and vOCR asymmetry in both positions were calculated and compared. Results: There was no statistically significant difference between the vOCR findings obtained in the right and left 30° lateral head tilt (p = 0.546) and body tilt (p = 0.114). vOCR asymmetry was determined as median (interquartile range) 0.08 (0.07) in lateral head tilt position and 0.09 (0.06) in body tilt position. The degree of static vOCR (8.75° [1.91]) detected during body tilt was statistically greater than the static vOCR (6.62 [1.69]) detected during head tilt (p < 0.001). There was no statistically significant difference in terms of ocular counter-roll asymmetry detected between head tilt and body tilt (p = 0.918). Conclusions: Our study shows a significant difference in the vOCR responses during head tilt and body tilt, a finding that should be considered during clinical evaluation of vestibular function. There was no significant asymmetry between the responses with either head or body tilt.

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Video ocular counter roll: A bedside test of otolith‐ocular function

Cited by 4 publications

References 7 publications

Focused Update on Clinical Testing of Otolith Organs

Focused Update on Clinical Testing of Otolith Organs

Focused Update on Clinical Testing of Otolith Organs

Investigation of Video Ocular Counter-Roll Findings According to Head and Body Tilt Positions in Healthy Subjects

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