Sun Bo, Baidillah Marlin Ramadhan, Darma Panji Nursetia, Shirai Tomoyuki, Narita Kosei, Takei Masahiro
Department of Mechanical Engineering, Graduate School of Science and Engineering, Chiba University, Chiba-shi, Japan.
MTG Co., Ltd., Nagoya-shi, Japan.
Physiol Meas. 2021 Apr 9;42(3). doi: 10.1088/1361-6579/abe9ff.
. The human skeletal muscle responds immediately under electrical muscle stimulation (EMS), and there is an immediate physiological response in human skeletal muscle. Non-invasive quantitative analysis is at the heart of our understanding of the physiological significance of human muscle changes under EMS. Response muscle areas of human calf muscles under EMS have been detected by frequency difference electrical impedance tomography (-EIT).. The experimental protocol consists of four parts: pre-training (), training (), post-training (), and relaxation () parts. The relaxation part has three relaxation conditions, which are massage relaxation (MR), cold pack relaxation (CR), and hot pack relaxation (HR).. From the experimental results, conductivity distribution images(means protocol = ,,,) are clearly reconstructed by-EIT as response muscle areas, which are called theresponse area (composed of gastrocnemius muscle) and theresponse area (composed of the tibialis anterior muscle, extensor digitorum longus muscle, and peroneus longus muscle). A paired samples-test was conducted to elucidate the statistical significance of spatial-mean conductivities 〈〉and 〈〉inandwith reference to the conventional extracellular water ratioby bioelectrical impedance analysis. From the-test results, 〈〉〈〉have good correlation with. In the post-training part, 〈〉 andwere significantly higher than in the pre-training part ( = 24, < 0.001). The relax-pre difference ratios of spatial-mean conductivity Δ〈〉 and the relax-pre difference ratios of extracellular water ratio Δin both MR and CR were lower; on the contrary, the Δ〈〉 and Δin HR were significantly higher than those in post-pre difference ratios of spatial-mean conductivity Δ〈〉 ( = 8, < 0.05). The reason for the changes in 〈〉and 〈〉are caused by the changes in muscle extracellular volumes. In conclusion,-EIT satisfactorily evaluates the effectiveness of human calf muscles under EMS.
人体骨骼肌在肌肉电刺激（EMS）下会立即做出反应，人体骨骼肌会产生即时的生理反应。非侵入性定量分析是我们理解EMS作用下人体肌肉变化生理意义的核心。通过频差电阻抗断层成像（-EIT）检测了EMS作用下人体小腿肌肉的反应肌肉区域。实验方案包括四个部分：训练前（）、训练（）、训练后（）和放松（）部分。放松部分有三种放松条件，即按摩放松（MR）、冷敷放松（CR）和热敷放松（HR）。从实验结果来看，通过-EIT清晰地重建了电导率分布图像（平均方案= ， ， ， ）作为反应肌肉区域，分别称为反应区域（由腓肠肌组成）和反应区域（由胫骨前肌、趾长伸肌和腓骨长肌组成）。进行了配对样本检验，以阐明空间平均电导率〈〉和〈〉在和中相对于传统细胞外水比率通过生物电阻抗分析的统计显著性。从检验结果来看，〈〉〈〉与具有良好的相关性。在训练后部分，〈〉和显著高于训练前部分（ = 24，< 0.001）。MR和CR中空间平均电导率的放松-训练前差异比率Δ〈〉和细胞外水比率的放松-训练前差异比率Δ均较低；相反，HR中的Δ〈〉和Δ显著高于空间平均电导率的训练后-训练前差异比率Δ〈〉（ = 8，< 0.05）。〈〉和〈〉变化的原因是肌肉细胞外体积的变化。总之，-EIT令人满意地评估了EMS作用下人体小腿肌肉的有效性。
