Stabilisation of walking by intrinsic muscle properties revealed in a three-dimensional muscle-driven simulation

被引:60
作者
John, Chand T. [1 ]
Anderson, Frank C. [2 ]
Higginson, Jill S. [3 ]
Delp, Scott L. [2 ,4 ]
机构
[1] Stanford Univ, Dept Comp Sci, Clark Ctr, Stanford, CA 94305 USA
[2] Stanford Univ, Dept Bioengn, Clark Ctr, Stanford, CA 94305 USA
[3] Univ Delaware, Dept Mech Engn, Spencer Lab 201A, Newark, DE 19716 USA
[4] Stanford Univ, Dept Mech Engn, Clark Ctr, Stanford, CA 94305 USA
基金
美国国家卫生研究院;
关键词
biomechanics; simulation; muscle; walking; stability; HUMAN LOWER-LIMB; LEVEL WALKING; DYNAMIC SIMULATIONS; STRETCH REFLEXES; HUMAN LOCOMOTION; LOWER-EXTREMITY; KNEE EXTENSION; NORMAL GAIT; SUPPORT; PROGRESSION;
D O I
10.1080/10255842.2011.627560
中图分类号
TP39 [计算机的应用];
学科分类号
081203 ; 0835 ;
摘要
A fundamental question in movement science is how humans perform stable movements in the presence of disturbances such as contact with objects. It remains unclear how the nervous system, with delayed responses to disturbances, maintains the stability of complex movements. We hypothesised that intrinsic muscle properties (i.e. the forcelengthvelocity properties of muscle fibres and tendon elasticity) may help stabilise human walking by responding instantaneously to a disturbance and providing forces that help maintain the movement trajectory. To investigate this issue, we generated a 3D muscle-driven simulation of walking and analysed the changes in the simulation's motion when a disturbance was applied to models with and without intrinsic muscle properties. Removing the intrinsic properties reduced the stability; this was true when the disturbing force was applied at a variety of times and in different directions. Thus, intrinsic muscle properties play a unique role in stabilising walking, complementing the delayed response of the central nervous system.
引用
收藏
页码:451 / 462
页数:12
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