Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability
Depth information is important for postural stability and is generated by two visual systems: binocular and motion parallax. The effect of each type of parallax on postural stability remains unclear. We investigated the effects of binocular and motion parallax loss on static postural stability using...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/23/8/4139 |
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| author | Keita Ishikawa Naoya Hasegawa Ayane Yokoyama Yusuke Sakaki Hiromasa Akagi Ami Kawata Hiroki Mani Tadayoshi Asaka |
| author_facet | Keita Ishikawa Naoya Hasegawa Ayane Yokoyama Yusuke Sakaki Hiromasa Akagi Ami Kawata Hiroki Mani Tadayoshi Asaka |
| author_sort | Keita Ishikawa |
| collection | DOAJ |
| description | Depth information is important for postural stability and is generated by two visual systems: binocular and motion parallax. The effect of each type of parallax on postural stability remains unclear. We investigated the effects of binocular and motion parallax loss on static postural stability using a virtual reality (VR) system with a head-mounted display (HMD). A total of 24 healthy young adults were asked to stand still on a foam surface fixed on a force plate. They wore an HMD and faced a visual background in the VR system under four visual test conditions: normal vision (Control), absence of motion parallax (Non-MP)/binocular parallax (Non-BP), and absence of both motion and binocular parallax (Non-P). The sway area and velocity in the anteroposterior and mediolateral directions of the center-of-pressure displacements were measured. All postural stability measurements were significantly higher under the Non-MP and Non-P conditions than those under the Control and Non-BP conditions, with no significant differences in the postural stability measurements between the Control and Non-BP conditions. In conclusion, motion parallax has a more prominent effect on static postural stability than binocular parallax, which clarifies the underlying mechanisms of postural instability and informs the development of rehabilitation methods for people with visual impairments. |
| first_indexed | 2024-03-11T04:32:38Z |
| format | Article |
| id | doaj.art-05d84b9befb64b17a4f6a1d419220591 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-11T04:32:38Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-05d84b9befb64b17a4f6a1d4192205912023-11-17T21:19:36ZengMDPI AGSensors1424-82202023-04-01238413910.3390/s23084139Effects of the Loss of Binocular and Motion Parallax on Static Postural StabilityKeita Ishikawa0Naoya Hasegawa1Ayane Yokoyama2Yusuke Sakaki3Hiromasa Akagi4Ami Kawata5Hiroki Mani6Tadayoshi Asaka7Graduate School of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanGraduate School of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanGraduate School of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanGraduate School of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanGraduate School of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanFaculty of Welfare and Health Science, Oita University, Oita 870-1124, JapanDepartment of Rehabilitation Sciences, Faculty of Health Sciences, Hokkaido University, Sapporo 060-0812, JapanDepth information is important for postural stability and is generated by two visual systems: binocular and motion parallax. The effect of each type of parallax on postural stability remains unclear. We investigated the effects of binocular and motion parallax loss on static postural stability using a virtual reality (VR) system with a head-mounted display (HMD). A total of 24 healthy young adults were asked to stand still on a foam surface fixed on a force plate. They wore an HMD and faced a visual background in the VR system under four visual test conditions: normal vision (Control), absence of motion parallax (Non-MP)/binocular parallax (Non-BP), and absence of both motion and binocular parallax (Non-P). The sway area and velocity in the anteroposterior and mediolateral directions of the center-of-pressure displacements were measured. All postural stability measurements were significantly higher under the Non-MP and Non-P conditions than those under the Control and Non-BP conditions, with no significant differences in the postural stability measurements between the Control and Non-BP conditions. In conclusion, motion parallax has a more prominent effect on static postural stability than binocular parallax, which clarifies the underlying mechanisms of postural instability and informs the development of rehabilitation methods for people with visual impairments.https://www.mdpi.com/1424-8220/23/8/4139binocular parallaxhead-mounted displaymotion parallaxpostural controlstatic balancevirtual reality |
| spellingShingle | Keita Ishikawa Naoya Hasegawa Ayane Yokoyama Yusuke Sakaki Hiromasa Akagi Ami Kawata Hiroki Mani Tadayoshi Asaka Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability Sensors binocular parallax head-mounted display motion parallax postural control static balance virtual reality |
| title | Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability |
| title_full | Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability |
| title_fullStr | Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability |
| title_full_unstemmed | Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability |
| title_short | Effects of the Loss of Binocular and Motion Parallax on Static Postural Stability |
| title_sort | effects of the loss of binocular and motion parallax on static postural stability |
| topic | binocular parallax head-mounted display motion parallax postural control static balance virtual reality |
| url | https://www.mdpi.com/1424-8220/23/8/4139 |
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