A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds
This study investigates human semicircular canal (SCC) dynamics under off-center rotational conditions. Previous research has modeled human rotational perception and the dynamic response of the SCCs by assuming a centered rotation state, where the rotation axis aligns with the SCC's center. How...
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Elsevier
2024-12-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024170661 |
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| author | Sion Cha Wooksung Kim |
| author_facet | Sion Cha Wooksung Kim |
| author_sort | Sion Cha |
| collection | DOAJ |
| description | This study investigates human semicircular canal (SCC) dynamics under off-center rotational conditions. Previous research has modeled human rotational perception and the dynamic response of the SCCs by assuming a centered rotation state, where the rotation axis aligns with the SCC's center. However, this assumption is not representative of most real-life rotational situations. Understanding the effect of the offset distance between the rotation axis and the centers of the SCCs is essential, yet many studies still rely on bandpass filter models that do not account for this factor. Experimental studies are also limited, and mock-up models have difficulty accurately depicting these dynamics due to the cupula's low Young's modulus. Therefore, this study models endolymph and cupula within the SCCs using the finite element method (FEM) and a two-way fluid-structure interaction (FSI) approach. The results compare cupula displacement across different rotational conditions: step velocity motion (SVM), step acceleration motion (SAM), and sinusoidal motion. Notably, as the offset distance increases, the gain factor increases while the long time constant decreases. This finding highlights the limitations of existing centered rotation-based bandpass filter models. Based on these findings, we propose a modified transfer function that accounts for offset distance, offering a more generalizable model for human rotational perception and the dynamic responses of the SCCs. Additionally, this study provides foundational data to address sensory conflict, spatial disorientation, and various applications that require a precise dynamics model. |
| format | Article |
| id | doaj-art-78049fc2cc1f44af9bce34e5a5c4b132 |
| institution | DOAJ |
| issn | 2405-8440 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj-art-78049fc2cc1f44af9bce34e5a5c4b1322025-08-20T02:52:27ZengElsevierHeliyon2405-84402024-12-011024e4103510.1016/j.heliyon.2024.e41035A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worldsSion Cha0Wooksung Kim1Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 37673, Republic of KoreaCorresponding author.; Department of Electrical Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-Ro, Nam-Gu, Pohang, Gyeongbuk, 37673, Republic of KoreaThis study investigates human semicircular canal (SCC) dynamics under off-center rotational conditions. Previous research has modeled human rotational perception and the dynamic response of the SCCs by assuming a centered rotation state, where the rotation axis aligns with the SCC's center. However, this assumption is not representative of most real-life rotational situations. Understanding the effect of the offset distance between the rotation axis and the centers of the SCCs is essential, yet many studies still rely on bandpass filter models that do not account for this factor. Experimental studies are also limited, and mock-up models have difficulty accurately depicting these dynamics due to the cupula's low Young's modulus. Therefore, this study models endolymph and cupula within the SCCs using the finite element method (FEM) and a two-way fluid-structure interaction (FSI) approach. The results compare cupula displacement across different rotational conditions: step velocity motion (SVM), step acceleration motion (SAM), and sinusoidal motion. Notably, as the offset distance increases, the gain factor increases while the long time constant decreases. This finding highlights the limitations of existing centered rotation-based bandpass filter models. Based on these findings, we propose a modified transfer function that accounts for offset distance, offering a more generalizable model for human rotational perception and the dynamic responses of the SCCs. Additionally, this study provides foundational data to address sensory conflict, spatial disorientation, and various applications that require a precise dynamics model.http://www.sciencedirect.com/science/article/pii/S2405844024170661Rotational perceptionSensory conflictSpatial orientationEccentric rotationVestibular systemFinite element method |
| spellingShingle | Sion Cha Wooksung Kim A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds Heliyon Rotational perception Sensory conflict Spatial orientation Eccentric rotation Vestibular system Finite element method |
| title | A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds |
| title_full | A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds |
| title_fullStr | A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds |
| title_full_unstemmed | A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds |
| title_short | A computational study on off-center rotational dynamics of human semicircular canals with implications for real and virtual worlds |
| title_sort | computational study on off center rotational dynamics of human semicircular canals with implications for real and virtual worlds |
| topic | Rotational perception Sensory conflict Spatial orientation Eccentric rotation Vestibular system Finite element method |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024170661 |
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