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一、在41例腹直肌鞘的肉眼观察,发现4例具有明显的双半环线,其余均为单半环綫,从横断面的标本上看到其中段均属典型排列,然近半环綫平面腹内斜肌腱与腹横肌腱纤维无不发生交织不易分离。二、腹直肌鞘前后壁的各层从2例单半环綫者的连续切片观察所得,鞘的上端至下端腹内斜肌和腹横肌腱纤维是逐渐向前壁增强的。经过两肌腱纤维交织后,腹横肌分为两层夹包腹直肌,直至腹横肌腱全部移向前壁时则形成半环綫。三、在具有双半环綫者2例连续切片的观察,其上位半环綫是由于腹内斜肌腱后层一度愈合在腹横肌腱上所形成,而下位半环綫仍与单半环綫者同,即腹横肌腱膜的后层消失所致。上、下位半环綫之间的腱纤维排列,在二例切片所见是不完全相同,一例成年尸标本,复见愈着后的腹内斜肌腱纤维至鞘的后壁,在童尸标本,则无腹内斜肌腱纤维参加,仅有腹横肌腱的后层。
First, 41 cases of rectus sheath observed by the naked eye and found that 4 cases have obvious double half ring, the rest are single half ring line, seen from the cross section of the specimen are typical arrangement of the middle, and then nearly half ring Line plane abdominal oblique tendon and tendon fibers tendon intertwined not difficult to separate. Second, the rectus abdominis sheath anterior and posterior wall of each layer from the two cases of single semi-circular serial sections were observed from the upper sheath to the lower end of the abdominal oblique and abdominal transverse tendon fibers are gradually increased to the anterior wall. After the tendons of the two tendons interwoven, the transverse abdominal muscle is divided into two layers of rectus abdominis, until the abdominal transverse tendon all move to the anterior wall when the formation of semi-ring. Third, with two semi-circular ring 2 cases of continuous section of the observation, the upper half-loop is due to the posterior oblique layer of the abdominal anastomosis once healed in the transverse abdominal tendon formed, and the lower half-ring still with a single half-ring With the same, that is, after the disappearance of the posterior abdominoplasty aponeurosis. Upper and lower semicircular tendon fibers arranged between the two cases are not seen the same slice, an adult specimen of the corpse, the more complex after the intra-abdominal oblique tendon fibers to the posterior wall of the sheath in the child dead specimens , There is no intra-abdominal oblique tendon fiber to participate, only the posterior transverse abdominal tendon.