Pairing Virtual Reality with Dynamic Posturography Serves To Differentiate Patients with Visual Vertigo

2006 ◽  
Author(s):  
E.A. Keshner ◽  
J. Streepey ◽  
Y. Dhaher ◽  
T.C. Hain
Keyword(s):  
Virtual Reality ◽  
Dynamic Posturography ◽  
Visual Vertigo

scholarly journals The effect of virtual reality on visual vertigo symptoms in patients with peripheral vestibular dysfunction: A pilot study

2012 ◽  
Vol 22 (5,6) ◽  
pp. 273-281 ◽  
Author(s):  
M. Pavlou ◽  
R.G. Kanegaonkar ◽  
D. Swapp ◽  
D.E. Bamiou ◽  
M. Slater ◽  
...  
Keyword(s):  
Virtual Reality ◽  
Pilot Study ◽  
Vestibular Dysfunction ◽  
Visual Vertigo

scholarly journals Use of Virtual Reality to Assess Dynamic Posturography and Sensory Organization: Instrument Validation Study (Preprint)

2020 ◽  
Author(s):  
Matthew William Wittstein ◽  
Anthony Crider ◽  
Samantha Mastrocola ◽  
Mariana Guerena Gonzalez
Keyword(s):  
Virtual Reality ◽  
Center Of Pressure ◽  
Force Plate ◽  
Fluctuation Analysis ◽  
Scaling Exponent ◽  
Sensory Organization Test ◽  
Dynamic Posturography ◽  
Sensory Organization ◽  
Intraclass Correlations ◽  
Absolute Agreement

BACKGROUND The Equitest system (Neurocom) is a computerized dynamic posturography device used by health care providers and clinical researchers to safely test an individual’s postural control. While the Equitest system has evaluative and rehabilitative value, it may be limited owing to its cost, lack of portability, and reliance on only sagittal plane movements. Virtual reality (VR) provides an opportunity to reduce these limitations by providing more mobile and cost-effective tools while also observing a wider array of postural characteristics. OBJECTIVE This study aimed to test the plausibility of using VR as a feasible alternative to the Equitest system for conducting a sensory organization test. METHODS A convenience sample of 20 college-aged healthy individuals participated in the study. Participants completed the sensory organization test using the Equitest system as well as using a VR environment while standing atop a force plate (Bertec Inc). The Equitest system measures the equilibrium index. During VR trials, the estimated equilibrium index, 95% ellipse area, path length, and anterior-posterior detrended fluctuation analysis scaling exponent alpha were calculated from center of pressure data. Pearson correlation coefficients were used to assess the relationship between the equilibrium index and center of pressure–derived balance measures. Intraclass correlations for absolute agreement and consistency were calculated to compare the equilibrium index and estimated equilibrium index. RESULTS Intraclass correlations demonstrated moderate consistency and absolute agreement (0.5 < intraclass correlation coefficient < 0.75) between the equilibrium index and estimated equilibrium index from the Equitest and VR sensory organization test (SOT), respectively, in four of six tested conditions. Additionally, weak to moderate correlations between force plate measurements and the equilibrium index were noted in several of the conditions. CONCLUSIONS This research demonstrated the plausibility of using VR as an alternative method to conduct the SOT. Ongoing development and testing of virtual environments are necessary before employing the technology as a replacement to current clinical tests.

scholarly journals Virtual reality devices for the evaluation and improvement of the postulate balance in older adults. State of art.

2018 ◽  
Vol 4 (4) ◽  
pp. 1266-1273
Author(s):  
Juan Cartes-Velásquez
Keyword(s):  
Older Adults ◽  
Virtual Reality ◽  
Cognitive Processes ◽  
Recent Literature ◽  
Wearable Sensors ◽  
Adherence To Treatment ◽  
Nintendo Wii ◽  
Dynamic Posturography ◽  
Virtual Training ◽  
Effectiveness Of Training

The cognitive processes and the motor system of the human being begin to deteriorate progressively with age, so that the postural actions that are executed to maintain balance become ineffective. Virtual reality can be effectively implemented as a method of diagnosis, training and rehabilitation of older adults. Recent literature shows that dynamic posturography can detect and classify the risk of falling. On the other hand, the use of wearable sensors allows to enrich the training based on virtual reality, being the most used console, the Nintendo Wii. The improvements achieved through virtual training are significant and similar to those obtained through conventional exercises. In addition, the implementation of virtual training increases adherence to treatment, but the effectiveness of training lies in the choice of the correct protocols. Maintaining the improvements will depend on the cognitive demand of the training. Currently, the systems under development seek to integrate virtual reality with wearable sensors and medical equipment. In the future, virtual reality can be used as a basis for the development of tele-rehabilitation systems.SUMMARY: The cognitive processes and the motor system of the human being begin to deteriorate progressively with age, so that the postural actions that are executed to maintain balance become ineffective. Virtual reality can be effectively implemented as a method of diagnosis, training and rehabilitation of older adults. Recent literature shows that dynamic posturography can detect and classify the risk of falling. On the other hand, the use of wearable sensors allows to enrich the training based on virtual reality, being the most used console, the Nintendo Wii. The improvements achieved through virtual training are significant and similar to those obtained through conventional exercises. In addition, the implementation of virtual training increases adherence to treatment, but the effectiveness of training lies in the choice of the correct protocols. Maintaining the improvements will depend on the cognitive demand of the training. Currently, the systems under development seek to integrate virtual reality with wearable sensors and medical equipment. In the future, virtual reality can be used as a basis for the development of tele-rehabilitation systems.

scholarly journals Visual dependence after vestibular rehabilitation by virtual reality in individuals with unilateral peripheral vestibular dysfunction – one year of results

2020 ◽  
Vol 30 (Supplement_2) ◽  
Author(s):  
B Cunha
Keyword(s):  
Virtual Reality ◽  
Visual Cues ◽  
Vestibular Rehabilitation ◽  
Vestibular Dysfunction ◽  
Dynamic Posturography ◽  
Velocity Parameter ◽  
Pressure Centre ◽  
Before And After ◽  
One Year ◽  
Visual Dependence

Abstract Introduction One of the most common approaches in individuals with unilateral peripheral vestibular dysfunction (UPVD) is vestibular rehabilitation (RV). Many factors can negatively affect the result of RV. Virtual reality based treatment may represent an important tool in the solution of these problems. In individuals with UPVD there is a decrease in the reception of vestibular stimuli and there is an adjustment in the reception of visual and proprioceptive stimuli. They use more visual cues to minimise the decrease in vestibular stimuli – visual dependence (VD). Although the importance and results of virtual reality as a tool in improving balance in individuals with UPVD have already been demonstrated, we intend to demonstrate that virtual reality allows significant improvements in the decrease in VD. Objectives The aim of the study is to compare VD levels in individuals with UPVD after RV program by virtual reality. Methodology For the evaluation of VD, dynamic posturography was performed with the Balance Rehabilition Unit equipment for 39 people with UPVD, before and after the RV program by virtual reality. Ten conditions were tested, with different visual and propriocetive stimuli. The parameters considered were the oscillation area of the pressure centre and the sway velocity. Results In the parameter of the oscillation area of the pressure centre, statistically significant results were found in the 10 conditions tested. In the sway velocity parameter, statistically significant results were found in the condition 1, 2, 3, 4, 5 e 10. Conclusion Virtual reality incorporated in the RV programs presents itself as an important tool in improving VD in individuals with UPVD.

Virtual reality versus optokinetic stimulation in visual vertigo rehabilitation

2021 ◽  
Author(s):  
Alaa El-sayed Mandour ◽  
Amani Mohamed El-Gharib ◽  
Afaf Ahmad Emara ◽  
Trandil Hassan Elmahallawy
Keyword(s):  
Virtual Reality ◽  
Optokinetic Stimulation ◽  
Visual Vertigo

scholarly journals Use of Virtual Reality to Assess Dynamic Posturography and Sensory Organization: Instrument Validation Study

10.2196/19580 ◽  
2020 ◽  
Vol 8 (4) ◽  
pp. e19580
Author(s):  
Matthew William Wittstein ◽  
Anthony Crider ◽  
Samantha Mastrocola ◽  
Mariana Guerena Gonzalez
Keyword(s):  
Virtual Reality ◽  
Center Of Pressure ◽  
Force Plate ◽  
Fluctuation Analysis ◽  
Scaling Exponent ◽  
Sensory Organization Test ◽  
Dynamic Posturography ◽  
Sensory Organization ◽  
Intraclass Correlations ◽  
Absolute Agreement

Background The Equitest system (Neurocom) is a computerized dynamic posturography device used by health care providers and clinical researchers to safely test an individual’s postural control. While the Equitest system has evaluative and rehabilitative value, it may be limited owing to its cost, lack of portability, and reliance on only sagittal plane movements. Virtual reality (VR) provides an opportunity to reduce these limitations by providing more mobile and cost-effective tools while also observing a wider array of postural characteristics. Objective This study aimed to test the plausibility of using VR as a feasible alternative to the Equitest system for conducting a sensory organization test. Methods A convenience sample of 20 college-aged healthy individuals participated in the study. Participants completed the sensory organization test using the Equitest system as well as using a VR environment while standing atop a force plate (Bertec Inc). The Equitest system measures the equilibrium index. During VR trials, the estimated equilibrium index, 95% ellipse area, path length, and anterior-posterior detrended fluctuation analysis scaling exponent alpha were calculated from center of pressure data. Pearson correlation coefficients were used to assess the relationship between the equilibrium index and center of pressure–derived balance measures. Intraclass correlations for absolute agreement and consistency were calculated to compare the equilibrium index and estimated equilibrium index. Results Intraclass correlations demonstrated moderate consistency and absolute agreement (0.5 < intraclass correlation coefficient < 0.75) between the equilibrium index and estimated equilibrium index from the Equitest and VR sensory organization test (SOT), respectively, in four of six tested conditions. Additionally, weak to moderate correlations between force plate measurements and the equilibrium index were noted in several of the conditions. Conclusions This research demonstrated the plausibility of using VR as an alternative method to conduct the SOT. Ongoing development and testing of virtual environments are necessary before employing the technology as a replacement to current clinical tests.

scholarly journals Effect of vestibular exercise and optokinetic stimulation using virtual reality in persistent postural-perceptual dizziness

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Seo-Young Choi ◽  
Jae-Hwan Choi ◽  
Eun Hye Oh ◽  
Se-Joon Oh ◽  
Kwang-Dong Choi
Keyword(s):  
Virtual Reality ◽  
Daily Living ◽  
Analogue Scale ◽  
Optokinetic Stimulation ◽  
Virtual Reality System ◽  
Head Mount Display ◽  
Dizziness Handicap Inventory ◽  
Gait Function ◽  
Visual Vertigo

AbstractTo determine the effect of customized vestibular exercise (VE) and optokinetic stimulation (OS) using a virtual reality system in patients with persistent postural-perceptual dizziness (PPPD). Patients diagnosed with PPPD were randomly assigned to the VE group or VE with OS group. All participants received VE for 20 min using a virtual reality system with a head mount display once a week for 4 weeks. The patients in the VE with OS group additionally received OS for 9 min. We analysed the questionnaires, timed up-to-go (TUG) test, and posturography scores at baseline and after 4 weeks. A total of 28 patients (median age = 74.5, IQR 66–78, men = 12) completed the intervention. From baseline to 4 weeks, the dizziness handicap inventory, activities of daily living (ADL), visual vertigo analogue scale, and TUG improved in the VE group, but only ADL and TUG improved in the VE with OS group. Patients with severe visual vertigo improved more on their symptoms than patients with lesser visual vertigo (Pearson’s p = 0.716, p < 0.001). Our VE program can improve dizziness, quality of life, and gait function in PPPD; however, additional optokinetic stimuli should be applied for individuals with visual vertigo symptoms.

Top-Down Processing and Visual Reorientation Illusions in a Virtual Reality Environment

2004 ◽  
Vol 63 (3) ◽  
pp. 143-149 ◽  
Author(s):  
Fred W. Mast ◽  
Charles M. Oman
Keyword(s):  
Virtual Reality ◽  
Visual Processing ◽  
Line Length ◽  
Perceptual Cues ◽  
Virtual Reality Environment ◽  
Top Down ◽  
Test Conditions ◽  
The Subject ◽  
Processing Mechanisms

The role of top-down processing on the horizontal-vertical line length illusion was examined by means of an ambiguous room with dual visual verticals. In one of the test conditions, the subjects were cued to one of the two verticals and were instructed to cognitively reassign the apparent vertical to the cued orientation. When they have mentally adjusted their perception, two lines in a plus sign configuration appeared and the subjects had to evaluate which line was longer. The results showed that the line length appeared longer when it was aligned with the direction of the vertical currently perceived by the subject. This study provides a demonstration that top-down processing influences lower level visual processing mechanisms. In another test condition, the subjects had all perceptual cues available and the influence was even stronger.

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