Control of angular momentum during walking in children with cerebral palsy
Control of angular momentum during walking in children with cerebral palsy
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DOI：
10.1016/j.ridd.2011.05.019
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发表时间：
2011-11-01
影响因子：
3.1
通讯作者：
Duysens, Jacques
中科院分区：
文献类型：
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作者：
Bruijn, Sjoerd M.;Meyns, Pieter;Duysens, Jacques
患有偏瘫脑瘫 (CP) 的儿童行走时有明显的不对称性。例如，我们最近发现，他们受影响一侧的手臂摆动较少，而未受影响一侧的手臂摆动较多。在未受影响的一侧增加手臂摆动可能是为了控制围绕垂直轴的全身角动量，尽管从未在这方面进行过研究。因此，在当前的研究中，我们研究了偏瘫 CP 的参与者是否通过未受影响的手臂的代偿性运动来控制角动量。我们测量了 11 名 CP 儿童和 24 名年龄匹配的典型发育 (TD) 儿童的步态运动学，以自我选择的速度和快速的步行速度行走，并计算了角动量。我们发现患有偏瘫脑瘫的儿童受影响手臂的角动量并未减少。然而，它们显示出腿部产生的角动量大幅增加，而未受影响的手臂的角动量增加则补偿了这一点。结果，TD 和 CP 儿童的全身角动量没有差异。此外，步行速度对两组的总体角动量没有影响。这些发现支持这样的观点，即行走时的角动量是一个受控变量，即使对于患有偏瘫脑瘫的儿童也是如此。 (C) 2011 Elsevier Ltd. 保留所有权利。
Children with hemiparetic Cerebral Palsy (CP) walk with marked asymmetries. For instance, we have recently shown that they have less arm swing on the affected side, and more arm swing at the unaffected side. Such an increase in arm swing at the unaffected side may be aimed at controlling total body angular momentum about the vertical axis, although it was never investigated in this respect. In the current study, we thus investigated if participants with hemiparetic CP control angular momentum by compensatory movements of the unaffected arm. We measured gait kinematics of 11 CP children, and 24 age matched typically developing (TD) children, walking at both self-selected and fast walking speeds, and calculated angular momenta. We found that children with hemiparetic CP did not have a reduced angular momentum of the affected arm. However, they showed substantial increases in angular momentum generated by the legs, which were compensated by increased angular momentum of the unaffected arm. As a result, there were no differences in total body angular momentum between TD and CP children. Moreover, walking speed had no effect on total body angular momentum in both groups. These findings support the idea that angular momentum during walking is a controlled variable, even in children with hemiplegic CP. (C) 2011 Elsevier Ltd. All rights reserved.