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首页> 外文期刊>Gait & posture >Adaptations in interlimb and intralimb coordination to asymmetrical loading in human walking.
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Adaptations in interlimb and intralimb coordination to asymmetrical loading in human walking.

机译：适应人类步行中不对称负荷的肢间和肢内协调。

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The purpose of this study was to examine both the intralimb (within a limb) and interlimb (between the right and left limbs) adaptations that occur in response to a unilaterally applied leg load as subjects walked at their preferred walking speed. It was hypothesized that this adaptation would alter interlimb coordination while intralimb coordination remained invariant. Subjects (n = 12) were required to walk on a treadmill at preferred walking speed. Bilateral 3-D kinematic data were collected while a load placed on the leg was increased. Gait adaptations to leg-loading were assessed through changes in coordination patterns between specific limb couplings. Continuous relative phase (CRP) was used to evaluate changes in limb coordination under each experimental load condition compared to a no load baseline condition. Both changes in magnitude of CRP (root-mean-square (RMS) analysis) as well as temporal changes in CRP across the stride cycle (cross-correlation) were assessed. Cross-Correlation values changed with load for all interlimb couplings assessed suggesting alterations in interlimb coordination across the stride cycle. CRP cross-correlation values were close to 1.0 in all the intralimb couplings examined, showing a relative invariance in intralimb coordination. Coordination changes in RMS were also observed for the interlimb couplings. RMS changes were also observed in the intralimb couplings on the loaded side. It appears that gait adaptations to a unilaterally applied leg load appear both at the intralimb and interlimb level. However, the majority of changes did appear at the interlimb level, where CRP as assessed through both cross-correlation and RMS measures changed. This study supports previous results that suggested a tighter coupling exists at the intralimb level, leaving the majority of gait adaptations to occur at the interlimb level. The observed adaptation in differences between interlimb and intralimb coordination may provide insight into gait adaptations in pathological gait.
机译：这项研究的目的是检查单侧施加的腿部负荷时受试者以其偏好的步行速度行走时发生的下肢内部（肢体内部）和中间肢体（左右肢体之间）的适应情况。据推测，这种适应将改变肢体间的协调，而肢体间的协调仍然不变。受试者（n = 12）被要求以理想的步行速度在跑步机上行走。在增加腿部负担的同时，收集了双边3-D运动学数据。通过特定肢体联结之间协调模式的变化，评估了步态对腿部负荷的适应性。与无负荷基线条件相比，连续相对相位（CRP）用于评估每种实验负荷条件下肢体协调性的变化。评估了CRP幅度的变化（均方根（RMS）分析）以及跨步周期（互相关）的CRP的时间变化。对于所有评估的跨肢耦合，互相关值均随载荷而变化，这表明跨步周期的跨肢协调性发生了变化。在所有检查的肢内耦合中，CRP互相关值均接近1.0，显示出肢内协调的相对不变性。还观察到了跨行耦合的RMS协调变化。在受力侧的下肢内联轴器中也观察到RMS变化。似乎对单侧施加的腿部负荷的步态适应出现在下肢和下肢水平上。但是，大多数更改的确出现在中间层，其中通过互相关和RMS度量评估的CRP发生了变化。这项研究支持以前的结果，这些结果表明在肢体内部存在更紧密的耦合，而大多数步态适应发生在肢体内部。观察到的肢体间协调和肢体内协调之间的差异适应可能为病理性步态的步态适应提供洞察力。

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