Higher Asymmetry Ratio and Refixation Saccades in Individuals with Motion Sickness

Neupane, Anuj Kumar; Gururaj, Krithika; Sinha, Sujeet Kumar

doi:10.3766/jaaa.16175

Cited by 17 publications

(20 citation statements)

References 38 publications

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“…In our study, in accordance with the work of Neupane et al (Neupane et al, 2018), the asymmetry rates of the individuals with motion sickness were higher than those of the healthy individuals. However, the asymmetry rates of the anterior canals of the individuals with motion sickness were statistically higher than those of the healthy individuals, while no statistical difference was found in other canals.…”

Section: Discussionsupporting

confidence: 93%

“…Neupane et al (Neupane et al, 2018) reported that all SSC VOR gains of the individuals with motion sickness were found to be statistically lower than those of the healthy individuals, which is in line with the results of the present study. Studies showing the decrease in VOR gains in individuals with peripheral vestibular pathology indicate the effect of motion sickness on the peripheral system (Weber et al, 2008, MacDougall et al, 2013.…”

Section: Discussionsupporting

confidence: 93%

“…Vomiting symptom can be seen with this processing difference (Yates et al, 1998). In addition, the asymmetry rate suggests vestibular disorders as an important parameter in determining SSC pathologies (Neupane et al, 2018). In a study in which asymmetry rates were evaluated using a Scleral search coil device, asymmetry rates were found between 22% and 65% in groups with vestibular pathology (MacDougall et al, 2013, Weber et al, 2008.…”

Section: Discussionmentioning

confidence: 99%

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Evaluation of Semicircular Canal Functions by the Video Head Impulse Test (vHIT) in Individuals with Motion Sickness

2020

JHMN

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Background: In the occurrence of motion sickness, the functioning of the vestibular system in harmony has an important role. Aim/Objective: To evaluate the effectiveness of the vestibular system in individuals with motion disease with the Video Head Impulse Test (vHIT) device, which evaluates the vestibulo-ocular reflex (VOR). Materials and Methods: Thirty individuals with motion sickness (21 females, 9 males) and 30 healthy individuals (11 females, 19 males) without any vestibular complaints were examined with the vHIT device. All participants were older than 18 years. Results: It was observed that VOR gain values of the individuals with motion disease were significantly lower than those of the healthy individuals. Asymmetry values of the individuals with motion disease in all semicircular canals were higher than those of the healthy individuals; however, this difference was statistically significant only in the anterior semicircular canal. Conclusion and Significance: The observation of low gain values in all semicircular canals in individuals with motion sickness suggested that individuals with motion sickness may experience dysfunction in the sensory organelles in the vestibular system. Studies with larger case series and audiological test batteries will help us better understand motion sickness.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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Evaluation of Semicircular Canal Functions by the Video Head Impulse Test (vHIT) in Individuals with Motion Sickness

2020

JHMN

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“…29,40,41 Blodow et al 31 suggested that compensatory refixation saccades occur as a result of reduced VOR gain in individuals with vestibulopathy. Also, the similar results obtained by Neupane et al 42 in individuals with motion sickness recommended compensatory refixation saccades as a good parameter in evaluating these individuals.…”

Section: Discussionsupporting

confidence: 75%

Importance of Vestibulo-ocular Reflex Gain and Refixation Saccade Analysis in Individuals with Auditory Neuropathy Spectrum Disorder

Sinha

Neupane

Gururaj

2019

Int Arch Otorhinolaryngol

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Introduction Auditory neuropathy spectrum disorder (ANSD) features the presence of otoacoustic emissions, poor speech identification score and absent auditory brainstem response. Objective The present study was designed to evaluate the functioning of all six semicircular canals in individuals with ANSD and to compare it with those of normal-hearing individuals. Methods A total of 50 individuals participated in the present study, in which Group I comprised 25 normal-hearing individuals, and Group II comprised 25 individuals with ANSD. All of the participants underwent case history, pure tone audiometry, immittance, otoacoustic emissions, auditory evoked response and video head impulse test (vHIT). Results The independent sample t-test revealed significantly lower vestibulo-ocular reflex gain values in individuals with ANSD. A presence of 100% corrective refixation saccades was observed in the same group. The Pearson correlation test revealed no significant correlation between vestibulo-ocular reflex (VOR) gain with duration of hearing loss and pure tone thresholds for any of the three orthogonal planes. The chi-squared test revealed no association between the VOR gain values and the presence or absence of saccades in any of the semicircular canals (p > 0.05). Conclusion Huge percentages of individuals with ANSD have been found to have associated vestibular dysfunction as well. Therefore, the vHIT can be used as one of the important tests of the vestibular test battery to evaluate all six semicircular canals in individuals with ANSD.

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“…We found changes in VEMP asymmetry ratio, with a substantial increase in VEMP amplitude recorded on the left sternocleidomastoid muscle following just one minute of exposure to vection in VR. Similarly, VEMP asymmetry has been reported to positively correlate with susceptibility to motion sickness (Xie et al., ; Neupane, Gururaj, & Sinha, ; however, see Buyuklu, Tarhan, & Ozluoglu, , for contradictory findings). While our results showed changes in VEMP asymmetry following exposure to vection in VR, we did not find a correlation between VEMP amplitude and motion sickness susceptibility in our sample.…”

Section: Discussionmentioning

confidence: 92%

Vection in virtual reality modulates vestibular‐evoked myogenic potentials

Gallagher

dowsett

Ferrè

2019

Eur J of Neuroscience

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The popularity of virtual reality (VR) has increased rapidly in recent years. While significant technological advancements are apparent, a troublesome problem with VR is that between 20% and 80% of users will experience unpleasant side effects such as nausea, disorientation, blurred vision and headaches—a malady known as Cybersickness. Cybersickness may be caused by a conflict between sensory signals for self‐motion: while vision signals that the user is moving in a certain direction with certain acceleration, the vestibular organs provide no corroborating information. To resolve the sensory conflict, vestibular cues may be down‐weighted leading to an alteration of how the brain interprets actual vestibular information. This may account for the frequently reported after‐effects of VR exposure. Here, we investigated whether exposure to vection in VR modulates vestibular processing. We measured vestibular‐evoked myogenic potentials (VEMPs) during brief immersion in a vection‐inducing VR environment presented via head‐mounted display. We found changes in VEMP asymmetry ratio, with a substantial increase in VEMP amplitude recorded on the left sternocleidomastoid muscle following just one minute of exposure to vection in VR. Our results suggest that exposure to vection in VR modulates vestibular processing, which may explain common after‐effects of VR.

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Higher Asymmetry Ratio and Refixation Saccades in Individuals with Motion Sickness

Abstract: Presence of higher asymmetry ratio in cVEMP and vHIT test results plus refixation saccades to stabilize the gaze in vHIT can suggest some amount of vestibular anomalies in individuals with motion sickness.

Cited by 17 publications

References 38 publications

Evaluation of Semicircular Canal Functions by the Video Head Impulse Test (vHIT) in Individuals with Motion Sickness

Evaluation of Semicircular Canal Functions by the Video Head Impulse Test (vHIT) in Individuals with Motion Sickness

Importance of Vestibulo-ocular Reflex Gain and Refixation Saccade Analysis in Individuals with Auditory Neuropathy Spectrum Disorder

Vection in virtual reality modulates vestibular‐evoked myogenic potentials

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