Physical and electrophysiological motor unit characteristics are revealed with simultaneous high-density electromyography and ultrafast ultrasound imaging.
Physical and electrophysiological motor unit characteristics are revealed with simultaneous high-density electromyography and ultrafast ultrasound imaging.
复制标题
物理和电生理运动单位的特点，揭示了同时高密度肌电图和超快超声成像。
DOI：
10.1038/s41598-022-12999-4
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发表时间：
2022-05-25
影响因子：
4.6
通讯作者：
中科院分区：
文献类型：
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作者：
肌电图和超声图提供了关于电生理和物理（即解剖和机械）肌肉特性的补充信息。在这项研究中，我们提出了一种将高密度表面肌电图（HDsEMG）和超快超声（US）相结合的方法来评估单个运动单元（MUs）的电和物理特性。从HDsEMG中提取的单个MU放电用于识别美国视频中肌肉组织位移的相应区域。将识别区域内组织位移速度随时间的变化作为MU组织位移速度。该方法在模拟条件下进行了验证，并应用于实验信号，研究了单MU动作电位振幅分布与识别位移区域之间的局部关联。我们能够在2 mm的误差范围内确定模拟MU在肌肉横截面上的位置，并重建模拟MU的位移速度（cc > 0.85）。对180例肱二头肌等距收缩时检测到的MU进行多元回归分析，发现MU位移区域的位置与肌电振幅分布的质心有显著相关性。所提出的方法有可能在自主收缩时对单个mu的电、解剖和机械特性进行无创评估。
Electromyography and ultrasonography provide complementary information about electrophysiological and physical (i.e. anatomical and mechanical) muscle properties. In this study, we propose a method to assess the electrical and physical properties of single motor units (MUs) by combining High-Density surface Electromyography (HDsEMG) and ultrafast ultrasonography (US). Individual MU firings extracted from HDsEMG were used to identify the corresponding region of muscle tissue displacement in US videos. The time evolution of the tissue velocity in the identified region was regarded as the MU tissue displacement velocity. The method was tested in simulated conditions and applied to experimental signals to study the local association between the amplitude distribution of single MU action potentials and the identified displacement area. We were able to identify the location of simulated MUs in the muscle cross-section within a 2 mm error and to reconstruct the simulated MU displacement velocity (cc > 0.85). Multiple regression analysis of 180 experimental MUs detected during isometric contractions of the biceps brachii revealed a significant association between the identified location of MU displacement areas and the centroid of the EMG amplitude distribution. The proposed approach has the potential to enable non-invasive assessment of the electrical, anatomical, and mechanical properties of single MUs in voluntary contractions.
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DOI：
10.1109/tnsre.2020.3027037
发表时间：
2020-11-01
影响因子：
4.9
作者：
Carbonaro, Marco;Seynnes, Olivier;Botter, Alberto
通讯作者：
Botter, Alberto
影响因子：
4.6
作者：
Cerone, Giacinto Luigi;Botter, Alberto;Gazzoni, Marco
通讯作者：
Gazzoni, Marco
DOI：
10.1109/tnsre.2022.3140220
发表时间：
2022-01-01
影响因子：
4.9
作者：
Cerone, G. L.;Giangrande, A.;Botter, A.
通讯作者：
Botter, A.
影响因子：
4.6
作者：
Dieterich AV;Botter A;Vieira TM;Peolsson A;Petzke F;Davey P;Falla D
通讯作者：
Falla D
一个新型的电极系统，可与超声透明，以同时检测骨骼肌的肌电活动和B模式超声图像。
DOI：
10.1152/japplphysiol.00090.2013
发表时间：
2013-10-15
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Botter A;Vieira TM;Loram ID;Merletti R;Hodson-Tole EF
通讯作者：
Hodson-Tole EF