Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach
Abstract The human being dynamically and highly controls the head–trunk with redundant mechanical structures to maintain a stable upright standing position that is inherently unstable. The posture control strategies are also affected by the differences in the conditions of sensory inputs. However, i...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2022-08-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-022-17322-9 |
| _version_ | 1811345185436598272 |
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| author | Kazuya Tanaka Soichiro Fujiki Tomoaki Atomi Wataru Takano Katsuya Hasegawa Akinori Nagano Miho Shimizu Yoriko Atomi |
| author_facet | Kazuya Tanaka Soichiro Fujiki Tomoaki Atomi Wataru Takano Katsuya Hasegawa Akinori Nagano Miho Shimizu Yoriko Atomi |
| author_sort | Kazuya Tanaka |
| collection | DOAJ |
| description | Abstract The human being dynamically and highly controls the head–trunk with redundant mechanical structures to maintain a stable upright standing position that is inherently unstable. The posture control strategies are also affected by the differences in the conditions of sensory inputs. However, it is unclear how the head–trunk segmental properties are altered to respond to situations that require appropriate changes in standing posture control strategies. We used a data-driven approach to conduct a multipoint measurement of head–trunk sway control in a quiet standing position with differences in the conditions of sensory inputs. Healthy young subjects with 22 accelerometers attached to their backs were evaluated for head–trunk vibration during quiet standing under two conditions: one with open eyes and one with closed eyes. The synchronization of the acceleration and the instantaneous phase was then calculated. The results showed that the synchronization of acceleration and instantaneous phase varied depending on the visual condition, and there were some continuous coherent patterns in each condition. Findings were that the structural redundancy of the head–trunk, which is multi-segmental and has a high mass ratio in the whole body, must be adjusted adaptively according to the conditions to stabilize upright standing in human-specific bipeds. |
| first_indexed | 2024-04-13T19:59:13Z |
| format | Article |
| id | doaj.art-932cfe700a9648adae90f269d69c1143 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-13T19:59:13Z |
| publishDate | 2022-08-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-932cfe700a9648adae90f269d69c11432022-12-22T02:32:14ZengNature PortfolioScientific Reports2045-23222022-08-0112111110.1038/s41598-022-17322-9Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approachKazuya Tanaka0Soichiro Fujiki1Tomoaki Atomi2Wataru Takano3Katsuya Hasegawa4Akinori Nagano5Miho Shimizu6Yoriko Atomi7Department of Physical Therapy, Faculty of Medical Sciences, Teikyo University of ScienceFaculty of Medicine, Dokkyo Medical UniversityDepartment of Physical Therapy, Faculty of Health Sciences, Kyorin UniversityCenter for Mathematical Modeling and Data Science, Osaka UniversityInstitute of Space and Astronautical Science/Japan Aerospace Exploration AgencyFaculty of Sport and Health Science, Ritsumeikan UniversityMaterial Health Science, Graduate School of Engineering, Tokyo University of Agriculture and TechnologyMaterial Health Science, Graduate School of Engineering, Tokyo University of Agriculture and TechnologyAbstract The human being dynamically and highly controls the head–trunk with redundant mechanical structures to maintain a stable upright standing position that is inherently unstable. The posture control strategies are also affected by the differences in the conditions of sensory inputs. However, it is unclear how the head–trunk segmental properties are altered to respond to situations that require appropriate changes in standing posture control strategies. We used a data-driven approach to conduct a multipoint measurement of head–trunk sway control in a quiet standing position with differences in the conditions of sensory inputs. Healthy young subjects with 22 accelerometers attached to their backs were evaluated for head–trunk vibration during quiet standing under two conditions: one with open eyes and one with closed eyes. The synchronization of the acceleration and the instantaneous phase was then calculated. The results showed that the synchronization of acceleration and instantaneous phase varied depending on the visual condition, and there were some continuous coherent patterns in each condition. Findings were that the structural redundancy of the head–trunk, which is multi-segmental and has a high mass ratio in the whole body, must be adjusted adaptively according to the conditions to stabilize upright standing in human-specific bipeds.https://doi.org/10.1038/s41598-022-17322-9 |
| spellingShingle | Kazuya Tanaka Soichiro Fujiki Tomoaki Atomi Wataru Takano Katsuya Hasegawa Akinori Nagano Miho Shimizu Yoriko Atomi Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach Scientific Reports |
| title | Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach |
| title_full | Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach |
| title_fullStr | Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach |
| title_full_unstemmed | Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach |
| title_short | Control of structural redundancy from the head to trunk in the human upright standing revealed using a data-driven approach |
| title_sort | control of structural redundancy from the head to trunk in the human upright standing revealed using a data driven approach |
| url | https://doi.org/10.1038/s41598-022-17322-9 |
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