Minamisawa Tadayoshi, Chiba Noboru, Suzuki Eizaburo
Department of Physical Therapy, Yamagata Prefectural University of Health Sciences, 260 Kamiyanagi, Yamagata 990-2212, Japan.
Department of Occupational Therapy, Yamagata Prefectural University of Health Sciences, 260 Kamiyanagi, Yamagata 990-2212, Japan.
Geriatrics (Basel). 2021 Dec 10;6(4):114. doi: 10.3390/geriatrics6040114.
Our aim was to clarify the effect of aging on the coherence of electromyograms of plantar flexor pairs during bipedal stance and to clarify the relationship between coherence and center-of-mass acceleration (COMacc). The subjects were 16 adults and 18 older adults. Intra- and intermuscular coherence and phase analyses were used to analyze the muscle pairs of bilateral and unilateral plantar flexor muscle groups. The relationship between coherence value and anterior-posterior COMacc of the plantar flexor muscle pairs was also examined to determine whether the connectivity of the lower limb muscle pairs is functionally important. The older adults showed higher coherence in the frequency range of 0-4 Hz for muscle pairs than the younger adults. In phase analysis, the older adults showed a phase difference between bilateral heteronymous muscle pairs in the frequency range of 0-6 Hz, which was one of the characteristics not seen in the younger adults. Correlation analysis showed that all the muscle pairs were moderately correlated with COMacc in the older adults. Not only does aging affects the organization of the bilateral and unilateral postural muscle activity of the plantar flexors during bipedal stance, but such organization may also be related to the increased COMacc characteristics of older adults.
我们的目的是阐明衰老对双足站立期间跖屈肌对肌电图相干性的影响，并阐明相干性与质心加速度（COMacc）之间的关系。受试者包括16名成年人和18名老年人。采用肌内和肌间相干性及相位分析来分析双侧和单侧跖屈肌群的肌肉对。还研究了跖屈肌对的相干值与前后COMacc之间的关系，以确定下肢肌肉对的连接性在功能上是否重要。老年人的肌肉对在0 - 4Hz频率范围内显示出比年轻人更高的相干性。在相位分析中，老年人在0 - 6Hz频率范围内双侧异名肌肉对之间表现出相位差，这是年轻人中未出现的特征之一。相关性分析表明，在老年人中所有肌肉对与COMacc均呈中度相关。衰老不仅会影响双足站立期间跖屈肌双侧和单侧姿势肌肉活动的组织，而且这种组织可能还与老年人COMacc增加的特征有关。
