Three-dimensional reconstruction of the anal striated musculature in a human fetus

被引:8
作者
Fröber, R [1 ]
Krebs, U
Haas, A
Fischer, MS
Schier, F
Linss, W
机构
[1] Univ Jena, Dept Anat 1, Inst Anat, D-07740 Jena, Germany
[2] Univ Jena, Dept Pediat Surg, D-07740 Jena, Germany
[3] Univ Jena, Inst Systemat Zool & Evolutionary Biol, D-07740 Jena, Germany
关键词
fetal anorectum; apparatus of continence; levator ani; external anal sphincter; puborectalis muscle; rat;
D O I
10.1159/000047873
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
Conflicting opinions in the recent literature indicate that the morphological organization and function of the anorectal continence organ has, up to now, not been clearly understood. But a clear imagination of the spatial arrangements of this compound muscle system is of clinical relevance for the pediatric surgeon performing reconstructive surgery. We analyzed 18-mum sections of the pelvic region of 4 human fetuses in order to describe the individual components of this muscle complex. A series of 630 Azan-stained sections was the base for the computer-assisted 3D reconstruction of the levator ani and the external sphincter complex in a male human fetus (14th week p.c.). In this context, special attention was paid to the intermediate muscle layer of the puborectalis which develops ventrally from the funnel-shaped levator ani and joins the tripartite ring system of the sphincter muscle dorsally. Our findings lead to a clear imagination of the spatial arrangement of this intermediate layer and characterize the anorectal muscle complex as an integrated ensemble in which the puborectalis holds a key position. Copyright (C) 2001 S.KargerAG, Basel.
引用
收藏
页码:152 / 157
页数:6
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