Muscular fatigue increases signal-dependent noise during isometric force production
Muscular fatigue increases signal-dependent noise during isometric force production
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DOI：
10.1016/j.neulet.2008.03.090
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发表时间：
2008-05-30
影响因子：
2.5
通讯作者：
Perrey, Stephane
中科院分区：
文献类型：
--
作者：
Missenard, Olivier;Mottet, Denis;Perrey, Stephane
本研究旨在描述疲劳对肌肉力量与其变异性之间关系的影响，这些肌肉力量与其变异性之间的关系在较宽的次最大力量范围内。8名参与者必须匹配4个水平的等长力量，从他们最大能力的7%到53%。在疲劳方案之前和之后重复该任务，该方案导致最大力损失类似于31%。我们发现，尽管力的变异性是成比例的力水平的增加，力的变异性与平均力的线性比例在疲劳过程中被保存。由于这种线性缩放是最佳感觉运动控制模型的先决条件，我们的研究结果扩大了这些模型对疲劳情况的解释能力，同时为理解中枢神经系统如何适应疲劳提供了新的途径。(c)2008爱思唯尔爱尔兰有限公司保留所有权利。
This study was designed to characterize the effect of fatigue on the relationship between muscular force and its variability over a broad range of submaximal forces. Eight participants had to match 4 levels of isometric force from 7 to 53% of their maximal capabilities. This task was repeated before and after a fatigue protocol that induced a loss of maximal force of similar to 31 %. We found that, despite an increase in force variability that was proportional to the force level, the linear scaling of force variability with mean force was preserved during fatigue. Because this linear scaling is a prerequisite for optimal sensorimotor control models, our results broaden the explanatory power of these models to the fatigue case, while at the same time offering new routes towards understanding how the central nervous system adapts to fatigue. (c) 2008 Elsevier Ireland Ltd. All rights reserved.