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首页> 外文期刊>Human movement science >Smaller muscle mass is associated with increase in EMG-EMG coherence of the leg muscle during unipedal stance in elderly adults
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Smaller muscle mass is associated with increase in EMG-EMG coherence of the leg muscle during unipedal stance in elderly adults

机译：较小的肌肉质量与腿部肌肉在老年人在老年人的腿部肌肉肌肉肌肉肌肉的增加有关

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Age-induced decline in the ability to perform daily activities is associated with a deterioration of physical parameters. Changes occur in neuromuscular system with age; however, the relationship between these changes and physical parameters has not been fully elucidated. Therefore, in this study, we aimed to determine the relationship between neuromuscular system evaluated using a coherence analysis of the leg muscles and physical parameters in community-dwelling healthy elderly adults. The participants were required to stand still in bipedal and unipedal stances on a force plate. Then, electromyography (EMG) was recorded from the tibialis anterior (TA) and medial and lateral gastrocnemius (MG/LG) muscles, and intermuscular coherence was calculated between the following pairs: TA and MG (TA-MG), TA and LG (TA-LG), and MG and LG (MG-LG). Furthermore, gait speed, unipedal stance time, and muscle mass were measured. EMG-EMG coherence for the MG-LG pair was significantly greater in the unipedal stance task than in the bipedal one (p=.001). Multiple linear regression analysis revealed that the muscle mass of the leg was negatively correlated with the change in the beta-band coherence for the MG-LG pair from bipedal to unipedal stance (R-2 = 0.067, standard beta = -0.345, p = .044). As the beta-band coherence could reflect the corticospinal activity, the increased beta-band coherence may be a compensation for the smaller muscle mass, or alternatively may be a sign of changes in the nervous system resulting in the loss of muscle mass.
机译：年龄诱导的日常活动能力下降与物理参数的恶化有关。随着年龄的增长，神经肌肉系统发生变化;然而，这些变化与物理参数之间的关系尚未完全阐明。因此，在本研究中，我们旨在确定使用腿部肌肉的相干性分析和社区住宅健康老年人的身体参数进行评估的神经肌肉系统之间的关系。参与者被要求仍然在力板上仍然处于双方和少位阶段。然后，从胫骨前（TA）和内侧和外侧胃肠肌（Mg / Lg）肌肉中记录肌电图（EMG），并且在以下对（ TA-LG）和MG和LG（MG-LG）。此外，测量步态速度，单位姿势时间和肌肉质量。在单向立场任务中，Mg-LG对的EMG-EMG相干性比双模型一体（P = .001）在显着更大。多元线性回归分析显示，腿的肌肉质量与从BipeDal对多管姿势的Mg-Lg对的β波段相干变化的变化呈负相关（R-2 = 0.067，标准β= -0.345，p = .044）。由于β带相干性能反映皮质脊髓活性，增加的β波段一致性可能是对较小肌肉质量的补偿，或者可以是神经系统变化的迹象导致肌肉质量损失。

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