Laboratory of Applied Physiology, Graduate School of Human and Environmental Studies, Kyoto University, Kyoto, Japan; Japan Society for the Promotion of Science (JSPS), Kyoto, Japan.
Diabetes Res Clin Pract. 2012 Sep;97(3):468-73. doi: 10.1016/j.diabres.2012.03.004. Epub 2012 Apr 6.
The purpose of the present study is to investigate spatial surface electromyography (SEMG) potential distribution pattern in type 2 diabetes mellitus (T2DM) patients.
Nine T2DM patients and nine age-matched healthy men (CON) performed a sustained isometric knee extension at 10% of maximal voluntary contraction for 120s. Multi-channel SEMG was recorded from the vastus lateralis muscle by means of 64 electrodes. To characterize spatial SEMG potential distribution pattern, modified entropy and correlation coefficients between same electrode locations were calculated at 15, 60 and 120s for the root mean square values.
At 60 and 120s, modified entropy in T2DM was significantly lower than those in CON (p<0.05). Correlation coefficients for T2DM were significantly higher than those for CON at 60 and 120s (p<0.05).
From these results, we suggested that T2DM patients continue to recruit limited and same motor units during the sustained contraction at low force level.
本研究旨在探讨 2 型糖尿病（T2DM）患者的空间表面肌电图（SEMG）电位分布模式。
9 例 T2DM 患者和 9 名年龄匹配的健康男性（CON）以 10%最大自主收缩力持续等长伸展膝关节 120s。通过 64 个电极，多通道 SEMG 记录股外侧肌的信号。为了描述空间 SEMG 电位分布模式，在 15、60 和 120s 时，根据均方根值计算了修正熵和相同电极位置之间的相关系数。
在 60 和 120s 时，T2DM 的修正熵明显低于 CON（p<0.05）。在 60 和 120s 时，T2DM 的相关系数明显高于 CON（p<0.05）。
从这些结果中，我们认为 T2DM 患者在低力量水平的持续收缩过程中持续募集有限且相同的运动单位。
