Relations between gait characteristics and subjective visual vertical results in young adults

Cho, In Hee; Kwon, Jung Won; Yeo, Sang Seok

doi:10.3233/ves-200694

Cited by 5 publications

(7 citation statements)

References 55 publications

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“…The F1 frequency band corresponds to an evaluation of the visual system among sensory functions related to the balance ability, the Many studies have reported that an increased SVV in patients with injury of the central or peripheral vestibular system can be related to the balance dysfunction. 16,22,23,28 Pereira et al 22 reported a correlation between the SVV and postural balance in Parkinson's disease patients. They suggested that patients with an impaired balance ability showed a large deviation of the SVV.…”

Section: J Kptmentioning

confidence: 99%

“…In particular, the effects of sex on the visual attraction index had the greatest effect on patients with benign paroxysmal postural vertigo. 28 Cho et al 16 reported on the different gait characteristics between subjects with an increased SVV and subjects with a normal range SVV. The subjects with the increased SVV showed significantly higher stride time variability and stride velocity variability than the control group.…”

Section: J Kptmentioning

confidence: 99%

“…The SVV compares the subjective and actual vertical lines felt by the test subject, and in healthy adults, differences may occur in the range of approximately 2°. 15,16 On the other hand, a difference in tilt of more than 4° based on the standard deviation indicates a problem with the SVV line with respect to the actual gravity vertical line. 15,16 Sen-J KPT sory information received from the vestibular system is involved in the movement of the ocular muscles and control of the position of the eye via the medial longitudinal fasciculus, the oculomotor nerve, trochlear nerve, and abducens nerve.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 On the other hand, a difference in tilt of more than 4° based on the standard deviation indicates a problem with the SVV line with respect to the actual gravity vertical line. 15,16 Sen-J KPT sory information received from the vestibular system is involved in the movement of the ocular muscles and control of the position of the eye via the medial longitudinal fasciculus, the oculomotor nerve, trochlear nerve, and abducens nerve. [17][18][19] Therefore, the vestibular system can be evaluated indirectly by observing the eye movement or perception of spatial information.…”

Section: Introductionmentioning

confidence: 99%

“…[17][18][19] Therefore, the vestibular system can be evaluated indirectly by observing the eye movement or perception of spatial information. 7,[12][13][14][15][16] Many previous studies reported the increasing pattern of SVV and the resulting difference in balance and walking ability in patients with peripherial or central vestibular disorders. 9,14,[20][21][22][23] However, there was no study which reported the effect of increased SVV titl in normal adults on static balance.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of the Static Balance Ability according to the Subjective Visual Vertical in Healthy Adults

Kwon

Yeo

2020

J Kor Phys Ther

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The subjective visual vertical (SVV) test is used to evaluate the otolith function in the inner ear. This study compared the different balance ability according to the results of the SVV in healthy adults. Methods: This study recruited 30 normal healthy subjects who did not have neurological and musculoskeletal disorders. The subjects were divided into experimental and control groups based on the results of SVV: experimental group, > 2°; control group, < 2°. The static balance ability was evaluated using the Fourier Index, which could evaluate the balance capacity objectively and quantitatively. Results: The mean angle of the SVV in the experimental and control groups was 4.44° and 0.59°, respectively. In the result of the Fourier series, the F1 frequency band in the experimental group showed a significantly higher value under one condition compared to the control group (p< 0.05). In the F2-4 and F5-6 frequency bands, the experimental group showed a significant increase in the Fourier series value under the four conditions compared to the control group (p< 0.05). In the F7-8 frequency band, significantly higher values of the Fourier series were observed in the experimental group under the three different conditions (p< 0.05). Conclusion: These results showed increased trunk sway while maintaining static balance in the experimental group who showed a larger SVV angle compared to the control group. The SVV can be applied to evaluate the vestibular system and balance ability in normal adults.

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Section: J Kptmentioning

confidence: 99%

Section: J Kptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of the Static Balance Ability according to the Subjective Visual Vertical in Healthy Adults

Kwon

Yeo

2020

J Kor Phys Ther

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The Function of the Proprioceptive, Vestibular and Visual Systems Following Fatigue in Individuals With and Without Chronic Ankle Instability

et al. 2022

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To maintain postural balance, the proprioceptive, vestibular, and visual systems continuously provide body position and movement data to the central nervous system. In this study, our main aim was to examine, for the first time, the influence of anaerobically or aerobically induced fatigue on these separate functions in persons with and without chronic ankle instability (CAI). We obtained assessments pre- and post-fatigue protocols from 60 physical education students ( Mage = 24.3, SD = 3.4) Twenty-seven students had CAI, and 33 students did not have CAI). To measure proprioception, we used the AMEDA device; for vision, we used near point of convergence (NPC); and, for vestibular function, we used subjective visual vertical (SVV). We found a pre-post proprioception (AMEDA) effect in the aerobic group ( p < .001), and a visual (NPC) effect in both anaerobic and aerobic participant groups (both p < .001). There were no visual system (NPC) fatigue effect differences among aerobic or anerobic participants who had or did not have CAI ( p = .047); there was a significant aerobic fatigue effect on proprioception (AMEDA) ( p = .010) that favored participants without CAI. There was a significant interaction effect between time of testing and CAI for visual (NPC) ( p = .003) in the aerobic group only. In both the anaerobic and aerobic groups, post-fatigue vestibular function (AMEDA) was significantly lower for those with than those without CAI (anaerobic: p = .030; and aerobic: p =.016). Thus, post-fatigue, participants with CAI showed worse proprioceptive, visual, and vestibular function than those without CAI. Future investigators should further examine each movement sense system in individuals with CAI.

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An Implanted Vestibular Prosthesis Improves Spatial Orientation in Animals with Severe Vestibular Damage

et al. 2021

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Gravity is a pervasive environmental stimulus, and accurate graviception is required for optimal spatial orientation and postural stability. The primary graviceptors are the vestibular organs, which include angular velocity (semicircular canals) and linear acceleration (otolith organs) sensors. Graviception is degraded in patients with vestibular damage, resulting in spatial misperception and imbalance. Since minimal therapy is available for these patients, substantial effort has focused on developing a vestibular prosthesis or vestibular implant (VI) that reproduces information normally provided by the canals (since reproducing otolith function is very challenging technically). Prior studies demonstrated that angular eye velocity responses could be driven by canal VI-mediated angular head velocity information, but it remains unknown whether a canal VI could improve spatial perception and posture since these behaviors require accurate estimates of angular head position in space relative to gravity. Here, we tested the hypothesis that a canal VI that transduces angular head velocity and provides this information to the brain via motion-modulated electrical stimulation of canal afferent nerves could improve the perception of angular head position relative to gravity in monkeys with severe vestibular damage. Using a subjective visual vertical task, we found that normal female monkeys accurately sensed the orientation of the head relative to gravity during dynamic tilts, that this ability was degraded following bilateral vestibular damage, and improved when the canal VI was used. These results demonstrate that a canal VI can improve graviception in vestibulopathic animals, suggesting that it could reduce the disabling perceptual and postural deficits experienced by patients with severe vestibular damage.

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Relations between gait characteristics and subjective visual vertical results in young adults

Cited by 5 publications

References 55 publications

Comparison of the Static Balance Ability according to the Subjective Visual Vertical in Healthy Adults

Comparison of the Static Balance Ability according to the Subjective Visual Vertical in Healthy Adults

The Function of the Proprioceptive, Vestibular and Visual Systems Following Fatigue in Individuals With and Without Chronic Ankle Instability

An Implanted Vestibular Prosthesis Improves Spatial Orientation in Animals with Severe Vestibular Damage

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