Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force
Abstract We investigated the coordinated activity patterns of muscles based on cosine tuning in the elderly during an isometric force exertion task. We also clarified whether these coordinated activity patterns contribute to the control of hip and knee joint torque and endpoint force as co-activatio...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2023-05-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-34208-6 |
| _version_ | 1797832086618374144 |
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| author | Keisuke Kubota Moeka Yokoyama Hiroki Hanawa Taku Miyazawa Keisuke Hirata Katsuya Onitsuka Tsutomu Fujino Naohiko Kanemura |
| author_facet | Keisuke Kubota Moeka Yokoyama Hiroki Hanawa Taku Miyazawa Keisuke Hirata Katsuya Onitsuka Tsutomu Fujino Naohiko Kanemura |
| author_sort | Keisuke Kubota |
| collection | DOAJ |
| description | Abstract We investigated the coordinated activity patterns of muscles based on cosine tuning in the elderly during an isometric force exertion task. We also clarified whether these coordinated activity patterns contribute to the control of hip and knee joint torque and endpoint force as co-activation. Preferred direction (PD) of activity for each muscle in 10 young and 8 older males was calculated from the lower limb muscle activity during isometric force exertion task in various directions. The covariance of endpoint force (η) was calculated from the exerted force data using a force sensor. Relationship between PD and η was used to examine the effect of muscle co-activation on the control of endpoint force. Co-activation between rectus femoris and semitendinosus/biceps femoris increased with changes in muscle PD. Additionally, the η values were significantly low, suggesting that co-activation of multiple muscles may contribute to endpoint force exertion. The mechanism for cooperative muscle activity is determined by the cosine tuning of the PD of each muscle, which affects the generation of hip and knee joint torque and endpoint force exertion. Co-activation of each muscle’s PD changes with age, causing increased muscle co-activation to control torque and force. We demonstrated that co-activation in the elderly is a stabilizer of unsteady joints and a muscle control strategy for cooperative muscle activity. |
| first_indexed | 2024-04-09T14:03:16Z |
| format | Article |
| id | doaj.art-5abde05090984e058ea9da8c35a6ed0e |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-09T14:03:16Z |
| publishDate | 2023-05-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-5abde05090984e058ea9da8c35a6ed0e2023-05-07T11:12:12ZengNature PortfolioScientific Reports2045-23222023-05-0113111110.1038/s41598-023-34208-6Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint forceKeisuke Kubota0Moeka Yokoyama1Hiroki Hanawa2Taku Miyazawa3Keisuke Hirata4Katsuya Onitsuka5Tsutomu Fujino6Naohiko Kanemura7Research Development Center, Saitama Prefectural UniversitySportology Center, Graduate School of Medicine, Juntendo UniversityDepartment of Rehabilitation, Faculty of Health Sciences, University of Human Arts and ScienceDepartment of Rehabilitation, Faculty of Health Sciences, University of Human Arts and ScienceDepartment of Rehabilitation, Faculty of Health Sciences, Tokyo Kasei UniversityGraduate Course of Health and Social Services, Saitama Prefectural UniversityDepartment of Rehabilitation, Faculty of Health Sciences, University of Human Arts and ScienceGraduate Course of Health and Social Services, Saitama Prefectural UniversityAbstract We investigated the coordinated activity patterns of muscles based on cosine tuning in the elderly during an isometric force exertion task. We also clarified whether these coordinated activity patterns contribute to the control of hip and knee joint torque and endpoint force as co-activation. Preferred direction (PD) of activity for each muscle in 10 young and 8 older males was calculated from the lower limb muscle activity during isometric force exertion task in various directions. The covariance of endpoint force (η) was calculated from the exerted force data using a force sensor. Relationship between PD and η was used to examine the effect of muscle co-activation on the control of endpoint force. Co-activation between rectus femoris and semitendinosus/biceps femoris increased with changes in muscle PD. Additionally, the η values were significantly low, suggesting that co-activation of multiple muscles may contribute to endpoint force exertion. The mechanism for cooperative muscle activity is determined by the cosine tuning of the PD of each muscle, which affects the generation of hip and knee joint torque and endpoint force exertion. Co-activation of each muscle’s PD changes with age, causing increased muscle co-activation to control torque and force. We demonstrated that co-activation in the elderly is a stabilizer of unsteady joints and a muscle control strategy for cooperative muscle activity.https://doi.org/10.1038/s41598-023-34208-6 |
| spellingShingle | Keisuke Kubota Moeka Yokoyama Hiroki Hanawa Taku Miyazawa Keisuke Hirata Katsuya Onitsuka Tsutomu Fujino Naohiko Kanemura Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force Scientific Reports |
| title | Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force |
| title_full | Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force |
| title_fullStr | Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force |
| title_full_unstemmed | Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force |
| title_short | Muscle co-activation in the elderly contributes to control of hip and knee joint torque and endpoint force |
| title_sort | muscle co activation in the elderly contributes to control of hip and knee joint torque and endpoint force |
| url | https://doi.org/10.1038/s41598-023-34208-6 |
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