Muscle contributions to support and progression over a range of walking speeds.
Muscle contributions to support and progression over a range of walking speeds.
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DOI：
10.1016/j.jbiomech.2008.07.031
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发表时间：
2008-11-14
影响因子：
2.4
通讯作者：
Delp, Scott L.
中科院分区：
文献类型：
--
作者：
Liu, May Q.;Anderson, Frank C.;Schwartz, Michael H.;Delp, Scott L.
肌肉通过提供垂直支撑和重心向前运动来驱动行走。为了量化肌肉对垂直支撑和前进的贡献（即，质心的垂直和前后加速度），生成步态的三维肌肉驱动模拟，并分析八个受试者以非常慢、慢、自由和快的速度在地面上行走。我们发现，臀大肌、臀中肌、股前肌、腘绳肌、腓肠肌和比目鱼肌是所有速度下支撑和前进的主要贡献者。除臀中肌外，这些肌肉的贡献一般随步行速度的增加而增加。在非常缓慢和缓慢的步行速度期间，早期站立中的垂直支撑主要由较直的肢体提供，使得骨骼排列而不是肌肉提供对重力的阻力。当步行速度从缓慢增加到自由时，来自vasti和soleus的支持的贡献急剧增加。在自由和快速行走速度过程中，更大的站立相膝关节屈曲导致股力量增加，这提供了支撑，但也减缓了进展，而对侧比目鱼肌同时提供了增加的推进力。这项研究提供了参考数据，肌肉的贡献，支持和进展在广泛的步行速度，并强调步行速度时，评估肌肉功能的重要性。
Muscles actuate walking by providing vertical support and forward progression of the mass center. To quantify muscle contributions to vertical support and forward progression (i.e., vertical and fore-aft accelerations of the mass center) over a range of walking speeds, three-dimensional muscle-actuated simulations of gait were generated and analyzed for eight subjects walking overground at very slow, slow, free, and fast speeds. We found that gluteus maximus, gluteus medius, vasti, hamstrings, gastrocnemius, and soleus were the primary contributors to support and progression at all speeds. With the exception of gluteus medius, contributions from these muscles generally increased with walking speed. During very slow and slow walking speeds, vertical support in early stance was primarily provided by a straighter limb, such that skeletal alignment, rather than muscles, provided resistance to gravity. When walking speed increased from slow to free, contributions to support from vasti and soleus increased dramatically. Greater stance-phase knee flexion during free and fast walking speeds caused increased vasti force, which provided support but also slowed progression, while contralateral soleus simultaneously provided increased propulsion. This study provides reference data for muscle contributions to support and progression over a wide range of walking speeds and highlights the importance of walking speed when evaluating muscle function.
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DOI：
10.1115/1.2834295
发表时间：
1998-02-01
影响因子：
1.7
作者：
Kuo, AD
通讯作者：
Kuo, AD
影响因子：
2.4
作者：
Neptune, Richard R.;Sasaki, Kotaro;Kautz, Steven A.
通讯作者：
Kautz, Steven A.
影响因子：
3.3
作者：
Lee, Song Joo;Hidler, Joseph
通讯作者：
Hidler, Joseph
DOI：
10.1115/1.1427703
发表时间：
2002-02-01
影响因子：
1.7
作者：
Kuo, AD
通讯作者：
Kuo, AD
影响因子：
2.4
作者：
den Otter, AR;Geurts, ACH;Duysens, J
通讯作者：
Duysens, J