Guazzelli Filho J, de Freitas V, Furlani J
Department of Anatomy, Instituto de Biociências, UNESP, Botucatu, São Paulo, Brasil.
Electromyogr Clin Neurophysiol. 1994 Jul-Aug;34(5):279-83.
The objective of this study is to analyze the simultaneity of the actions of the three portions of the trapezius (superior portion = TS; middle portion = TM and inferior portion = TI) in elevation, lowering, retraction and protraction of the shoulders. The electromyographic tests were carried out in 20 volunteers using a 4-channel TECA TE 2-7 electromyograph and surface and single coaxial needle electrodes. The electromyographs, obtained with the two types of electrodes, show that in elevation and lowering of the shoulders, TS and TM present increasing and decreasing activity, respectively, from the beginning until the end of these movements. In retraction of the shoulders, TM and TI present increasing activity from the beginning to the end of the movement. In protraction, TS, TM and TI do not show any activity.
本研究的目的是分析斜方肌三个部分（上部 = TS；中部 = TM；下部 = TI）在肩部抬高、降低、后缩和前伸动作中的同步性。使用四通道TECA TE 2 - 7肌电图仪以及表面电极和单芯同轴针电极，对20名志愿者进行了肌电图测试。用这两种电极获得的肌电图显示，在肩部抬高和降低过程中，从这些动作开始到结束，TS和TM的活动分别呈增加和减少趋势。在肩部后缩过程中，从动作开始到结束，TM和TI的活动呈增加趋势。在前伸过程中，TS、TM和TI均未显示任何活动。
