A System for the Measurement of the Subjective Visual Vertical using a Virtual Reality Device

Negrillo-Cárdenas, José; Rueda, Antonio J.; Ogáyar, Carlos J.; Lomas‐Vega, Rafael; Segura, Rafael J.

doi:10.1007/s10916-018-0981-y

Cited by 15 publications

(16 citation statements)

References 34 publications

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“…First, sociodemographic variables were recorded, including gender, age, height, weight, years at university, smoking habit, and physical activity. To quantify deviation of the perceived vertical from the theoretical vertical, the static SVV test was used through a new virtual reality system [ 14 ] during the interictal phase of headache process. The virtual reality system requires a mobile device placed into the back of a headset and a Google Cardboard-enabled application (Sistema de Realidad Virtual para Detección y Tratamiento de las Patologías Posturales y del Equilibrio, University of Jaén, Jaén, Spain, 2019) to generate a pair of stereo images ( Figure 2 ).…”

Section: Methodsmentioning

confidence: 99%

“…For treatment of the dependent variable in this study, deviation of the SVV value from normal was also considered, taking as normal values those between −2.5° (left deviation) and 2.5° (right deviation) [ 5 ]. The device was validated and showed good reliability (Intraclass Correlation Coefficient (ICC) = 0.85; 95% confidence interval (CI) = 0.75–0.92) [ 14 ]. The evaluation was always made with visual correction if the patient had it prescribed.…”

Section: Methodsmentioning

confidence: 99%

“…However, the bucket test is a limited method that does not allow automated data storage and is not sufficiently versatile to be able to implement different versions of VV measurements. For this reason, in recent years, various wearable methods have been created using virtual reality and mobile devices [ 7 , 14 ]. Most of these new methods have been tested in healthy subjects to analyze the methods′ feasibility and reliability.…”

Section: Introductionmentioning

confidence: 99%

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New Mobile Device to Measure Verticality Perception: Results in Young Subjects with Headaches

et al. 2020

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The subjective visual vertical (SVV) test has been frequently used to measure vestibular contribution to the perception of verticality. Recently, mobile devices have been used to efficiently perform this measurement. The aim of this study was to analyze the perception of verticality in subjects with migraines and headaches. A cross-sectional study was conducted that included 28 patients with migraine, 74 with tension-type headache (TTH), and 93 healthy subjects. The SVV test was used through a new virtual reality system. The mean absolute error (MAE) of degrees deviation was also measured to qualify subjects as positive when it was greater than 2.5°. No differences in the prevalence of misperception in verticality was found among healthy subjects (31.18%), migraineurs (21.43%), or those with TTH (33.78%) (p = 0.480). The MAE was not significantly different between the three groups (migraine = 1.36°, TTH = 1.61°, and healthy = 1.68°) (F = 1.097, p = 0.336, and η2 = 0.011). The perception of verticality could not be explained by any variable usually related to headaches. No significant differences exist in the vestibular contribution to the perception of verticality between patients with headaches and healthy subjects. New tests measuring visual and somatosensory contribution should be used to analyze the link between the perception of verticality and headaches.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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New Mobile Device to Measure Verticality Perception: Results in Young Subjects with Headaches

et al. 2020

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“…The SVV test consists in vertically adjusting a luminous rod into a dark background without cues and any other vertical references 13 . Different systems based on the SVV test have been developed to diagnose the misperception of VV from analogic and cheap tools as “the bucket test” 12 to novel and sophisticated virtual reality devices 14 . When vestibular inputs are altered, the CNS increases the participation of visual cues to maintain the balance in a phenomena termed field dependence 15 .…”

Section: Introductionmentioning

confidence: 99%

Misperception of Visual Vertical in Peripheral Vestibular Disorders. A Systematic Review With Meta‐Analysis

et al. 2020

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Objective The main aim was to assess the misperception of visual verticality (VV) in patients with peripheral vestibular disorders (PVD) in comparison with healthy controls. As secondary objectives, we checked if vestibular, visual, and somatosensory postural pathways can be affected in patients with PVD as well as the characteristics of PVD that could influence on the VV perception. Methods A systematic review with meta‐analysis was carried out. The bibliographic search was performed in January, 2020 in PubMed, Scopus, Web of Science (WOS), CINAHL, SciELO. Two reviewers selected the studies that met the inclusion criteria, extracted data, and assessed the methodological quality using the Newcastle‐Ottawa Scale (NOS). The VV perception was assessed in two meta‐analysis according the used test: The Subjective Visual Vertical test (SVV) or the Rod and Frame Test (RFT) in comparison with healthy subjects. The Standardized Mean Difference (SMD) and its 95% Confidence Interval (95% CI) was used to estimate the pooled effect. Publication bias was assessed using the Egger's test and Trim and Fill Method. Results Thirty‐four studies were included reporting 3,524 participants. PVD patients showed a misperception of the VV with SVV (SMD = 1.510; 95%CI: 1.190–1.830) and the RFT (SMD = 0.816; 95% CI: 0.234–1.398) respect healthy controls. A subgroup of patients in the acute phase (SMD = 2.5; 95%CI: 2.022–2.978) and who underwent a vestibular surgery (SMD = 2.241; 95%CI: 1.471–3.011) had the greater misperception of VV. Conclusion Patients with PVD show an alteration in the perception of VV, being greater in the acute phase and after a vestibular surgery. Laryngoscope, 131:1110–1121, 2021

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“…After virtual reality technology came to the market, many systems were studied for SVV. [9][10][11][12] One of these applications was the Virtual SVV system by Interacoustics. There are a limited number of studies with this system.…”

Section: Introductionmentioning

confidence: 99%

The effect of head roll and soft surface on Virtual SVV in healthy subjects: A normalization study

Ardıç¹,

Şentürk²,

Çil³

2020

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Objective: The utricle is a crucial structure for a sense of gravity, but the contribution of proprioceptive receptors is also essential. This study aimed to measure the effect of head roll and soft surface on subjective visual vertical (SVV) in healthy subjects to determine the effect of neck and plantar proprioceptive inputs. Methods: In the first experiment, 78 healthy subjects performed 0, 15, 30, and 45-degree head rolls to the left and right side while standing. Three measurements were performed in every position. In the second experiment, 40 healthy subjects performed the same head maneuvers on a 20 cm thick soft surface. The Virtual SVV system (Virtual SVVTM, Interacoustics, Denmark) was utilized for all measurements. Results: The mean SVV on a hard surface was-0.99±2.34 degree at 0°. The SVV deviation increased with increasing head roll angle. The head roll to the right on a hard surface resulted in significantly different SVV angles than the neutral position (p<0.05). There was no significant difference in left head roll positions except at 15° (p>0.05). SVV deviation increased on the soft surface. Nevertheless, there was no significant difference between the two surface conditions. Conclusion: The new Virtual SVV system measures SVV accurately. SVV deviation in the neutral position is similar to published results. However, under stress conditions such as with head roll and on a soft surface, every clinic has to set their normative data before comparing patients.

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A System for the Measurement of the Subjective Visual Vertical using a Virtual Reality Device

Cited by 15 publications

References 34 publications

New Mobile Device to Measure Verticality Perception: Results in Young Subjects with Headaches

New Mobile Device to Measure Verticality Perception: Results in Young Subjects with Headaches

Misperception of Visual Vertical in Peripheral Vestibular Disorders. A Systematic Review With Meta‐Analysis

The effect of head roll and soft surface on Virtual SVV in healthy subjects: A normalization study

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