Long-term phase angle muscle imaging under electrical muscle stimulation (EMS) by phase angle electrical impedance tomography.

IF 2.3 4区 医学 Q3 BIOPHYSICS Physiological measurement Pub Date : 2024-08-01 DOI:10.1088/1361-6579/ad6749
Bo Sun, Prima Asmara Sejati, Tomoyuki Shirai, Masahiro Takei
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Abstract

Objectives. Phase angle muscle imaging has been proposed by phase angle electrical impedance tomography (ΦEIT) under electrical muscle stimulation (EMS) for long-term monitoring of muscle quality improvement, especially focusing on calf muscles.Approach. In the experiments, twenty-four subjects are randomly assigned either to three groups: control group (CG,n= 8), low voltage intensity of EMS training group (LG,n= 8), and optimal voltage intensity of EMS training group (OG,n= 8).Main results. From the experimental results, phase angle distribution imagesФare cleared reconstructed by ФEIT as four muscle compartments over five weeks experiments, which are called theM1muscle compartments composed of gastrocnemius muscle,M2muscle compartments composed of soleus muscle,M3muscle compartments composed of tibialis-posterior muscle, flexor digitorum longus muscle, and flexor pollicis longus muscle, andM4muscle compartment composed of the tibialis anterior muscle, extensor digitorum longus muscle, and peroneus longus muscle.Фis inversely correlated with age, namely theФdecreases with increasing age. A paired samplest-test was conducted to elucidate the statistical significance of spatial-mean phase angle in all domain <Ф>Ωand in each muscle compartment <Ф>Mwith reference to the conventional phase angle Ф by bioelectrical impedance analysis, muscle grey-scaleGmuscleby ultrasound, and maximal dynamic strengthSMaxby one-repetition maximum test.Significance. From thet-test results, <Ф>Ωhave good correlation with Ф andSMax. In the OG, <ФW5>Ω,ФW5, and (SMax)W5were significantly higher than in the first week (n= 8,p< 0.05). A significant increase in the phase angle of bothM1andM4muscle compartments is observed after five weeks in LG and OG groups. Only the OG group shows a significant increase in the phase angle ofM2muscle compartment after five weeks. However, no significant changes in the spatial-mean phase angle ofM3compartment are observed in each group. In conclusion, ФEIT satisfactorily monitors the response of each compartment in calf muscle to long-term EMS training.

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通过相位角电阻抗断层扫描对肌肉电刺激(EMS)下的肌肉进行长期相位角成像。
相位角肌肉成像是通过 EMS 下的相位角电阻抗断层扫描来实现的,用于长期监测肌肉质量的改善,尤其侧重于小腿肌肉。实验中,24 名受试者被随机分配到三组:对照组(CG,n = 8)、低电压强度 EMS 训练组(LG,n = 8)和最佳电压强度 EMS 训练组(OG,n = 8)。根据实验结果,ФEIT 将五周实验中的相位角分布图像Ф清除重建为四个肌肉区,即由腓肠肌组成的 M1 区,由比目鱼肌组成的 M2 区,由胫骨后肌、趾长屈肌和腓长屈肌组成的 M3 区,以及由胫骨前肌、趾长伸肌和腓骨长肌组成的 M4 区。Ф与年龄成反比,即Ф随着年龄的增加而减少。通过生物电阻抗分析、超声波肌肉灰度 Gmuscle 和单次重复最大测试最大动态力量 SMax,采用配对样本 t 检验来阐明所有结构域 Ω 和各肌肉区 M 的空间平均相位角与常规相位角 Ф 的统计学意义。从 t 检验结果来看,Ω 与 Ф 和 SMax 有很好的相关性。在 OG 中,Ω、ФW5 和 (SMax)W5 显著高于第一周(n = 8,P < 0.05)。在 LG 组和 OG 组中,M1 和 M4 肌区的相位角在 5 周后都有明显增加。只有 OG 组在 5 周后 M2 的相位角有明显增加。然而,各组 M3 的空间平均相位角均无明显变化。总之,ФEIT 可以令人满意地监测小腿肌肉各区对长期 EMS 训练的反应。
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来源期刊
Physiological measurement
Physiological measurement 生物-工程:生物医学
CiteScore
5.50
自引率
9.40%
发文量
124
审稿时长
3 months
期刊介绍: Physiological Measurement publishes papers about the quantitative assessment and visualization of physiological function in clinical research and practice, with an emphasis on the development of new methods of measurement and their validation. Papers are published on topics including: applied physiology in illness and health electrical bioimpedance, optical and acoustic measurement techniques advanced methods of time series and other data analysis biomedical and clinical engineering in-patient and ambulatory monitoring point-of-care technologies novel clinical measurements of cardiovascular, neurological, and musculoskeletal systems. measurements in molecular, cellular and organ physiology and electrophysiology physiological modeling and simulation novel biomedical sensors, instruments, devices and systems measurement standards and guidelines.
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