Effects of tilt of the visual stimuli on the perception of gravitational vertical under normal- and hyper-gravity conditions

Negishi, Ippei; Mizushina, Haruki; Ogata, K.

doi:10.1007/s10043-009-0054-z

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…Furthermore, when considered in terms of frequency, it has been shown that lower frequencies (below 1 Hz) result in greater COP migration [20]. In a study on the perception of gravity by visual stimuli, it was reported that the vection effect does not increase any further when the tilt angle exceeds 20 degrees, but rather diminishes [21]. These factors may have caused the VR1 condition (with a tilt angle of up to 10 degrees at 1 • /s) to have the strongest vection effect, resulting in a greater degree of COP movement.…”

Section: Discussionmentioning

confidence: 99%

The Application of Balance Exercise Using Virtual Reality for Rehabilitation

et al. 2022

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To prevent falls, it is important to devise a safe balance training program that can be easily performed. This study investigated whether tilting an image in virtual reality (VR) can generate a center-of-gravity sway. Five men and five women were asked to rest standing upright (control condition) and to rest standing upright with a head-mounted display showing a tilted virtual image (VR condition), and changes in their standing balance were observed. Standing balance was assessed by measuring the distance traveled by the center of pressure (COP) of each of the participants’ legs. In order to investigate the effects of different tilt speeds and angles on COP, four different images were displayed in VR: an image tilting to 10° moving at a rate of 1°/s; an image tilting to 20° moving 1°/s; an image tilting to 10° moving 10°/s; an image tilting to 20° moving 10°/s. Change in COP was significantly greater in the VR than in the control condition (p < 0.01), and a tilt of 10° moving 1°/s showed the greatest change in COP (p < 0.01). Tilting an image in VR while in a resting standing position can change an individual’s COP; thus, VR may be applied to balance training.

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Section: Discussionmentioning

confidence: 99%

The Application of Balance Exercise Using Virtual Reality for Rehabilitation

et al. 2022

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“…Many studies have investigated SVV, including the threshold of body tilt and its age-related change, 12,13 body balance in healthy individuals, 14 relationship to vestibular migraine and vestibulopathy patients, 15,16 and so on. The SVV has been used to characterize gravity perception under various gravity conditions, such as microgravity, 17 hypergravity, 18,19 and whole-body tilt. 20 However, these methods are not suitable for clinical examinations due to the bulky equipment, high costs, and complex protocols involved.…”

Section: Introductionmentioning

confidence: 99%

Effect of head roll‐tilt on the subjective visual vertical in healthy participants: Towards better clinical measurement of gravity perception

Wada

Yamanaka

Kitahara

et al. 2020

Laryngoscope Investig Oto

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Objective: Gravity perception is an essential function for spatial orientation and postural stability; however, its assessment is not easy. We evaluated the head-tilt perception gain (HTPG, that is, mean perceptual gain [perceived/actual tilt angle] during left or right head roll-tilt conditions) and head-upright subjective visual vertical (SVV) using a simple method developed by us to investigate the characteristics of gravity perception in healthy participants. Methods: We measured the SVV and head roll-tilt angle during head roll-tilt within ±30 of vertical in the sitting and standing positions while the participant maintained an upright trunk (sitting, 434 participants; standing, 263 participants). We evaluated the head-upright SVV, HTPG, and laterality of the HTPG. Results: We determined the reference ranges of the absolute head-upright SVV (<2.5), HTPG (0.80-1.25), and HTPG laterality (<10%) for the sitting position. The head-upright SVV and HTPG laterality were not influenced by sex or age. However, the HTPG was significantly greater in women than in men and in middle-aged (30-64 years) and elderly (65-88 years) participants than in young participants (18-29 years). The HTPG, but not the head-upright SVV or HTPG laterality, was significantly higher in the standing vs sitting position. Conclusion: The HTPG is a novel parameter of gravity perception involving functions of the peripheral otolith and neck somatosensory systems to the central nervous system. The HTPG in healthy participants is influenced by age and sex in the sitting position and immediately increases after standing to reinforce the righting reflex for unstable posture, which was not seen in the head-upright SVV, previously considered the only parameter.

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Perceptual reversal of bi-stable figures in microgravity and hypergravity during parabolic flight

Clément

Demel

2012

Neuroscience Letters

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Effects of tilt of the visual stimuli on the perception of gravitational vertical under normal- and hyper-gravity conditions

Cited by 4 publications

References 12 publications

The Application of Balance Exercise Using Virtual Reality for Rehabilitation

The Application of Balance Exercise Using Virtual Reality for Rehabilitation

Effect of head roll‐tilt on the subjective visual vertical in healthy participants: Towards better clinical measurement of gravity perception

Perceptual reversal of bi-stable figures in microgravity and hypergravity during parabolic flight

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