Dynamic stability of superior vs. inferior segments during walking in young and older adults.
Dynamic stability of superior vs. inferior segments during walking in young and older adults.
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DOI：
10.1016/j.gaitpost.2009.05.003
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发表时间：
2009-08
期刊：
影响因子：
2.4
通讯作者：
Dingwell, Jonathan B.
中科院分区：
文献类型：
--
作者：
Kang, Hyun Gu;Dingwell, Jonathan B.
躯干运动的主动控制被认为使人类能够在行走期间保持稳定性，这表明躯干的稳定性优先于神经系统的其他部分。我们研究了在行走过程中，上级节段是否比下节段更稳定，以及在任何特定的身体节段中，与年龄相关的差异是否更突出。18名健康的老年人和17名健康的年轻人在跑步机上以他们喜欢的速度行走2次，每次5分钟。记录躯干、骨盆、左大腿、小腿和足部的3D运动学。局部发散指数和最大Floquet乘数（FM）进行了计算，以量化每个部分的小固有扰动行走过程中的反应。老年人和年轻人的步行速度相似（p = 0.86）。下段的局部发散指数较大（p<0.001），老年人较大（p<0.001）。FM在上级节段中较大（p<0.001），在老年人中较大（p<0.001）。躯干运动的局部发散指数的年龄相关差异较大（相互作用p = 0.02）。因此，上级节段表现出较少的局部不稳定性，但更大的眼眶不稳定性。躯干运动是更敏感的动态稳定性在步态与年龄相关的差异。在研究与年龄相关的步态退化时，应考虑躯干运动。
Active control of trunk motion is believed to enable humans to maintain stability during walking, suggesting that stability of the trunk is prioritized over other segments by the nervous system. We investigated if superior segments are more stable than inferior segments during walking and if age-related differences are more prominent in any particular body segments. Eighteen healthy older adults and 17 healthy young adults walked on a treadmill for 2 trials of 5 minutes each at their preferred speed. 3D kinematics of the trunk, pelvis, and left thigh, shank, and foot were recorded. Local divergence exponents and maximum Floquet multipliers (FM) were calculated to quantify each segment’s responses to small inherent perturbations during walking. Both older and younger adults walked with similar preferred walking speeds (p = 0.86). Local divergence exponents were larger in inferior segments (p<0.001), and larger in older adults (p<0.001). FM was larger in the superior segments (p<0.001), and larger in older adults (p<0.001). The age-associated difference in local divergence exponents was larger for trunk motion (interaction p = 0.02). Thus, superior segments exhibited less local instability but greater orbital instability. Trunk motion was more sensitive to age-associated differences in dynamic stability during gait. Trunk motion should be considered in studying age-related deterioration of gait.
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影响因子：
2.4
作者：
Dingwell, JB;Marin, LC
通讯作者：
Marin, LC
DOI：
10.1115/1.2746383
发表时间：
2007-08-01
影响因子：
1.7
作者：
Dingwell, Jonathan B.;Kang, Hyun Gu
通讯作者：
Kang, Hyun Gu
DOI：
10.1111/j.1532-5415.1995.tb07395.x
发表时间：
1995-11-01
影响因子：
6.3
作者：
TINETTI, ME;DOUCETTE, JT;CLAUS, EB
通讯作者：
CLAUS, EB
影响因子：
8.6
作者：
PACKARD, NH;CRUTCHFIELD, JP;SHAW, RS
通讯作者：
SHAW, RS
影响因子：
4
作者：
ROSENSTEIN, MT;COLLINS, JJ;DE LUCA, CJ
通讯作者：
DE LUCA, CJ