PDF(Pubmed)
Abstract：
The purpose of this study was the detection and characterization of synergistic muscle activity. Using T2-map MRI, T2 values for 10 forearm muscles in 11 healthy adult volunteers were obtained in the resting state and after isotonic forearm supination and pronation exercises with the elbow extended. T2 was normalized by Z = (T2e-T2r)/SDr, where T2e was T2 after exercise, while T2r and SDr were the reference values of 34 ms and 3 ms, respectively. Using the cumulative frequency curves of Z values (CFZ), we detected 2 and 3 synergistic muscles for supination and pronation, respectively, and divided these into 2 types, one activated by exercise strength dependently, and the other, independent of exercise strength, activated by only a smaller fraction of the participants. We also detected co-contraction for the supination. Thus, CFZ is a useful visualization tool to detect and characterize not only synergistic muscle, but also co-contraction muscle.
摘要：
这项研究的目的是检测和表征协同肌肉活性。使用T2-mapMRI，在静息状态下以及肘部等张前臂前旋和内旋运动后，获得了11名健康成年志愿者的10条前臂肌肉的T2值。T2归一化为Z=(T2e-T2r)/SDr，运动后T2e是T2，而T2r和SDr是34ms和3ms的参考值，分别。使用Z值（CFZ）的累积频率曲线，我们检测到2和3个协同肌肉的旋旋和内旋，分别,并将其分为两种类型，一个被锻炼力量激活的依赖，另一个,独立于锻炼强度，只有一小部分参与者激活。我们还检测到旋后的共收缩。因此，CFZ是一种有用的可视化工具，不仅可以检测和表征协同肌肉，还有共同收缩肌肉。
