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在100具中国成年人尸体上,从五个平面将腹直肌鞘横行切断,观察了腹直肌鞘的组成,弓状线的形成、数目和位置,并在四个平面上测量了腹白线的宽度。腹直肌鞘的组成,在不同平面有不同的成分,脐部是肌鞘的典型部分,于此,鞘前壁由腹外斜肌腱膜和腹内斜肌腱膜前层形成,鞘后壁由腹内斜肌腱膜后层和腹横肌腱膜形成。参加鞘前壁的各层结构有向上递减,向下递增的现象,参加鞘后壁的各层结构与鞘前壁相反,是向上递增而向下递减。弓状线的出现率为82.5％,其中15.5％具有两条,一条为弓状线,另一条为副弓状线。弓状线的位置多在脐与耻骨联合上缘间的上1/3和中1/3交点平面附近。副弓状线则位于弓状线的下方。弓状线是由于腹内斜肌腱膜与腹横肌腱膜在腹直肌鞘后壁下份骤然终止下行所形成。腹白线在脐平面以上较宽,在脐平面以下变窄,多呈线状,最宽处是在剑突与脐之间的中1/3与下1/3交点平面,平均为11.9毫米。
On the body of 100 Chinese adults, the rectus abdominis sheath was transected transversely from five planes. The composition of the rectus sheath, the formation, number and location of the arcuate line were observed. The abdomen was measured on four planes Line width. The composition of the rectus sheath, in different planes have different components, the typical portion of the muscular sheath umbilical, where the anterior wall of the sheath from the external oblique aponeurosis and the formation of the anterior abdominal aponeurosis, posterior sheath by the Abdominal oblique posterior aponeurosis and abdominal transverse fascioplasty. The structure of the layers participating in the sheath anterior descending upward and downward increasing, the structure of the layers participating in the posterior wall of the sheath is opposite to the anterior sheath of the sheath, increasing upwardly and decreasing downward. The incidence of arcuate line was 82.5%, of which 15.5% had two arcuate lines and the other arched arcuate line. The location of the arcuate line mostly in the upper umbilical and pubic symphysis between the upper 1/3 and 1/3 near the intersection plane. The arched line is located below the arcuate line. Arcuate line is due to the abdominal oblique aponeurosis and abdominal transverse fascia in the rectus abdominis posterior wall under the sudden termination of the formation of down. Belly white line in the umbilical plane above the wide, below the umbilical plane in the narrow, mostly linear, the widest point in the xiphoid and umbilical 1/3 and 1/3 of the intersection plane, with an average of 11.9 mm .