Contributions of Limb Joints to Energy Absorption during Landing in Cats
There is a high risk of serious injury to the lower limbs in a human drop landing. However, cats are able to jump from the same heights without any sign of injury, which is attributed to the excellent performance of their limbs in attenuating the impact forces. The bionic study of the falling cat la...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Applied Bionics and Biomechanics |
| Online Access: | http://dx.doi.org/10.1155/2019/3815612 |
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| author | Xueqing Wu Baoqing Pei Yuyang Pei Nan Wu Kaiyuan Zhou Yan Hao Wei Wang |
| author_facet | Xueqing Wu Baoqing Pei Yuyang Pei Nan Wu Kaiyuan Zhou Yan Hao Wei Wang |
| author_sort | Xueqing Wu |
| collection | DOAJ |
| description | There is a high risk of serious injury to the lower limbs in a human drop landing. However, cats are able to jump from the same heights without any sign of injury, which is attributed to the excellent performance of their limbs in attenuating the impact forces. The bionic study of the falling cat landing may therefore contribute to improve the landing-shock absorbing ability of lower limbs in humans. However, the contributions of cat limb joints to energy absorption remain unknown. Accordingly, a motion capture system and plantar pressure measurement platform were used to measure the joint angles and vertical ground reaction forces of jumping cats, respectively. Based on the inverse dynamics, the joint angular velocities, moments, powers, and work from different landing heights were calculated to expound the synergistic mechanism and the dominant muscle groups of cat limb joints. The results show that the buffering durations of the forelimbs exhibit no significant difference with increasing height while the hindlimbs play a greater role than the forelimbs in absorbing energy when jumping from a higher platform. Furthermore, the joint angles and angular velocities exhibit similar variations, indicating that a generalized motor program can be adopted to activate limb joints for different landing heights. Additionally, the elbow and hip are recognized as major contributors to energy absorption during landing. This experimental study can accordingly provide biological inspiration for new approaches to prevent human lower limb injuries. |
| format | Article |
| id | doaj-art-52af0cd8703c47acb190bd9a719c236a |
| institution | Kabale University |
| issn | 1176-2322 1754-2103 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Applied Bionics and Biomechanics |
| spelling | doaj-art-52af0cd8703c47acb190bd9a719c236a2025-02-03T06:05:47ZengWileyApplied Bionics and Biomechanics1176-23221754-21032019-01-01201910.1155/2019/38156123815612Contributions of Limb Joints to Energy Absorption during Landing in CatsXueqing Wu0Baoqing Pei1Yuyang Pei2Nan Wu3Kaiyuan Zhou4Yan Hao5Wei Wang6School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, ChinaSchool of Biological Science and Medical Engineering, Beihang University, Beijing 100083, ChinaSchool of Public Health, Nanjing Medical University, Nanjing 211166, ChinaSchool of Biological Science and Medical Engineering, Beihang University, Beijing 100083, ChinaSchool of Biological Science and Medical Engineering, Beihang University, Beijing 100083, ChinaSchool of Biological Science and Medical Engineering, Beihang University, Beijing 100083, ChinaSchool of Biological Science and Medical Engineering, Beihang University, Beijing 100083, ChinaThere is a high risk of serious injury to the lower limbs in a human drop landing. However, cats are able to jump from the same heights without any sign of injury, which is attributed to the excellent performance of their limbs in attenuating the impact forces. The bionic study of the falling cat landing may therefore contribute to improve the landing-shock absorbing ability of lower limbs in humans. However, the contributions of cat limb joints to energy absorption remain unknown. Accordingly, a motion capture system and plantar pressure measurement platform were used to measure the joint angles and vertical ground reaction forces of jumping cats, respectively. Based on the inverse dynamics, the joint angular velocities, moments, powers, and work from different landing heights were calculated to expound the synergistic mechanism and the dominant muscle groups of cat limb joints. The results show that the buffering durations of the forelimbs exhibit no significant difference with increasing height while the hindlimbs play a greater role than the forelimbs in absorbing energy when jumping from a higher platform. Furthermore, the joint angles and angular velocities exhibit similar variations, indicating that a generalized motor program can be adopted to activate limb joints for different landing heights. Additionally, the elbow and hip are recognized as major contributors to energy absorption during landing. This experimental study can accordingly provide biological inspiration for new approaches to prevent human lower limb injuries.http://dx.doi.org/10.1155/2019/3815612 |
| spellingShingle | Xueqing Wu Baoqing Pei Yuyang Pei Nan Wu Kaiyuan Zhou Yan Hao Wei Wang Contributions of Limb Joints to Energy Absorption during Landing in Cats Applied Bionics and Biomechanics |
| title | Contributions of Limb Joints to Energy Absorption during Landing in Cats |
| title_full | Contributions of Limb Joints to Energy Absorption during Landing in Cats |
| title_fullStr | Contributions of Limb Joints to Energy Absorption during Landing in Cats |
| title_full_unstemmed | Contributions of Limb Joints to Energy Absorption during Landing in Cats |
| title_short | Contributions of Limb Joints to Energy Absorption during Landing in Cats |
| title_sort | contributions of limb joints to energy absorption during landing in cats |
| url | http://dx.doi.org/10.1155/2019/3815612 |
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