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用表面电极记录某一特定肌肉活动的准确性,不仅取决于电极是否准确地放置于该肌肉表面,而且与电极放置方向与肌纤维方向是否平行密切相关。腹肌肌纤维的走行方向比较复杂,肌电图表面电极的放置部位及方向无客观标准。为此本文作者以体表骨性标志为参照,研究腹外斜肌、腹内斜肌和腹直肌在其最表浅部位的肌纤维走行方向。 研究对象为37具尸体,男19例,年龄77.2±11.1岁;女18例.年龄80±7.1岁。 在第8肋接近肋软骨部位,仅有腹外斜肌而无其它腹肌覆盖。以第8肋下缘为参照线,这部分腹外斜肌纤维走行较参照线略垂直.其夹角男性为4°,女性为3°,二者无显著性差异。腹外斜肌肋缘以下部分以肋缘最低点和对侧耻骨结节连线为参照线,这部
The accuracy of using a surface electrode to record the activity of a particular muscle depends not only on whether the electrode is accurately placed on the muscle surface but also on whether the electrode is oriented parallel to the direction of the muscle fiber. Abdominal muscle fibers walking more complicated direction, the EMG surface electrode placement site and direction of an objective standard. To this end, the author of the body surface markers as a reference to study the abdominal oblique, abdominal oblique and rectus abdominis in its most superficial part of the muscle fiber walking direction. The subjects were 37 bodies, 19 males, aged 77.2 ± 11.1 years and 18 females aged 80 ± 7.1 years. In the eighth rib close to the costal cartilage site, only the abdominal oblique without other abdominal muscles covered. With the lower edge of the eighth rib as the reference line, the part of the extravertebral oblique fibers was slightly perpendicular to the reference line, with an angle of 4 ° for men and 3 ° for women. There was no significant difference between the two. The following part of the abdominal oblique rib margin to the lowest point of the rib margin and the contralateral pubic nodule connection as a reference line, this