Postural responses to sinusoidal modulations of viewpoint position in a virtual environment

Garner, Jordan J; D’Zmura, Michael

doi:10.1007/s00221-020-05816-9

Cited by 3 publications

(2 citation statements)

References 25 publications

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“…In particular, the Nintendo Wii Balance Board and the Microsoft Kinect v2 have extensively been validated (46,47). Combined with headmounted virtual reality headsets that allow for convenient presentation of immersive visual stimuli, these devices provide cost-effective and mobile means to assess postural control (45,48).…”

Section: Introductionmentioning

confidence: 99%

Visual perturbation of balance suggests impaired motor control but intact visuomotor processing in Parkinson’s disease

Engel

Student

Schwenk

et al. 2021

Journal of Neurophysiology

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Postural instability marks one of the most disabling features of Parkinson's disease (PD), but only reveals itself after affected brain areas have already been significantly damaged. Thus, there is a need to detect deviations in balance and postural control before visible symptoms occur. In this study, we visually perturbed balance in the anterior-posterior direction using sinusoidal oscillations of a moving room in virtual reality at different frequencies. We tested three groups: individuals with PD under dopaminergic medication, an age-matched control group, and a group of young healthy adults. We tracked their centre of pressure and their full-body motion, from which we also extracted the centre of mass. We investigated sway amplitudes and applied newly introduced phase-locking analyses to investigate responses across participants' bodies. Patients exhibited significantly higher sway amplitudes as compared to the control subjects. However, their sway was phase-locked to the visual motion like that of age-matched and young healthy adults. Furthermore, all groups successfully compensated for the visual perturbation by phase-locking their sway to the stimulus. As frequency of the perturbation increased, distribution of phase-locking (PL) across the body revealed a shift of the highest PL-values from the upper body towards the hip-region for young healthy adults, which could not be observed in patients and elderly healthy adults. Our findings suggest an impaired motor control, but intact visuo-motor processing in early stages of PD, while less flexibility to adapt postural strategy to different perturbations revealed to be an effect of age rather than disease.

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Section: Introductionmentioning

confidence: 99%

Visual perturbation of balance suggests impaired motor control but intact visuomotor processing in Parkinson’s disease

Engel

Student

Schwenk

et al. 2021

Journal of Neurophysiology

View full text Add to dashboard Cite

show abstract

“…In particular, the Nintendo Wii Balance Board and the Microsoft Kinect v2 have extensively been validated (Dehbandi et al, 2017; Clark et al, 2018). Combined with head-mounted virtual reality headsets which allow for convenient presentation of immersive visual stimuli, these devices provide cost-effective and mobile means to assess postural control (Garner & D’Zmura, 2020; Engel et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Visual perturbation of balance suggests impaired neuromuscular stability but intact visuo-motor control in Parkinson’s disease

Engel

Student²,

Jc³

et al. 2021

Preprint

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Postural instability marks one of the most disabling features of Parkinson's disease (PD), but only reveals itself after affected brain areas have already been significantly damaged. Thus, there is a need to detect deviations in balance and postural control before visible symptoms occur. In this study, we visually perturbed balance in the anterior-posterior direction using sinusoidal oscillations of a moving room in virtual reality at different frequencies. We tested three groups: individuals with PD under dopaminergic medication, an age-matched control group, and a group of young healthy adults. We tracked their centre of pressure and their full-body motion. We investigated sway amplitudes and applied newly introduced phase-locking analyses to investigate responses across participants' bodies. Patients exhibited significantly higher sway amplitudes as compared to the control subjects. However, their sway was phase-locked to the visual motion like that of age-matched and young healthy adults. Furthermore, all groups successfully compensated for the visual perturbation by - most likely reflexively - phase-locking their sway to the stimulus. As frequency of the perturbation increased, distribution of phase-locking (PL) across the body revealed a shift of the highest PL-values from the upper body towards the hip-region for young healthy adults, which could not be observed in patients and elderly healthy adults. Our findings suggest an impaired neuromuscular stability, but intact visuomotor processing in early stages of PD, while less flexibility to adapt postural strategy to different perturbations revealed to be an effect of age rather than disease.

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Gender differences in color perceptions and preferences of urban façades based on a virtual comparison

He,

Sun

2023

Building and Environment

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Postural responses to sinusoidal modulations of viewpoint position in a virtual environment

Cited by 3 publications

References 25 publications

Visual perturbation of balance suggests impaired motor control but intact visuomotor processing in Parkinson’s disease

Visual perturbation of balance suggests impaired motor control but intact visuomotor processing in Parkinson’s disease

Visual perturbation of balance suggests impaired neuromuscular stability but intact visuo-motor control in Parkinson’s disease

Gender differences in color perceptions and preferences of urban façades based on a virtual comparison

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