肛管直肠肌环(简称“肛直环”)是环绕肛管与直肠连接的括约肌群的总称,自Milligan-Morgan(1934)首次提出以来,迄今国内外文献均未见详细报道。作者观察了58例尸体标本(成人42例,小儿16例;男39例,女19例)。详细描述了肛直环的组成、形态和位置,讨论了耻骨直肠肌的形态 Anorectal muscle loop (referred to as the “anal loop”) is a general term for the sphincter group connected with the rectum and rectum. Since the first proposal by Milligan-Morgan (1934), no detailed reports have been reported in the literature at home and abroad. The authors observed 58 cases of dead bodies (42 adults and 16 children); 39 males and 19 females. Described in detail the composition of the anal ring, shape and location, discussed the shape of the puborectalis muscle