摘要
作者解剖了168例成人及小儿标本,系统观察了肛门括约肌复合体(ASMC)的形态及神经支配,发现ASMC的发育有个体差异:耻骨直肠肌发育完好者72.4%,发育欠佳者22.4%,缺如者5.2%。内、外括约肌厚度之比一般为1:1.5,但有时内括约肌(IS)小于外括约肌(ES),其比例可达1:3或1:5。有些情况相反,IS厚度可超过ES2～3倍。耻骨直肠肌神经较恒定,多数来自盆内脏神经。肛门神经以单干起自会阴神经者的出现率为最高(45.8%)。结合临床讨论了ASMC在肛肠外科方面的实际意义。
The auther dissected 168 adult and infant cadavers and the form and innervation of anal sphincter muscle complex (ASMC) were observed. It was found that there were individual variations in development of ASMC. The well-developed puborectalis accounted for 72.4%, the poorly developed 22.4% and no puborectalis 5.2%. Usually, the ratio of the thickness of the internal (IS) and external sphincter (ES) was 1: 1.5. Occasionally, IS was thinner than ES. Their ratio was 1 : 3 or 1: 5. On the other hand, IS might be 2~3 times thicker than ES. N. puborectalis existed in most cases. It mostly originated from the pelvic splanchnic nerve. The most frequent existence of the anal nerve (45.8%) was in those of single thunks originating from the perineal nerve. The clinical significance of ASMC in the ano rectal surgery is also discussed.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
1991年第3期266-269,共4页
Academic Journal of Second Military Medical University
关键词
肛门
括约肌
神经
形态
anal sphincter
anal nerve
puborectal nerve
