人脑Willis动脉环“三分叉”的显微解剖  

Microanatomy of "the Trifurcation" in arterial circle of Willis

作　　者：高文伟[1] 薛绛宇[1] 陈炯[1] Biond Bhattarai 崔宇辉[1] 陈世文[1] 田恒力[1] 徐涛[1] 

机构地区：[1]上海交通大学附属第六人民医院神经外科,200233

出　　处：《上海医学》2010年第1期68-69,F0002,共3页Shanghai Medical Journal

基　　金：国家自然科学基金(39270671)资助项目

摘　　要：目的了解人脑Willis动脉环"三分叉"的解剖特点,为颅底外科及介入治疗提供参考依据。方法45例(90侧)经10%甲醛溶液处理的人脑标本在光学显微镜下观察、测量和摄影。结果"三分叉"的出现率为15.6%(7/45),其中大脑前动脉(ACA)双侧A1段管径明显不等(血管外径相差0.5mm以上)6例(13.3%),一侧A1段缺如1例(2.2%)。前交通动脉(AcoA)变异率为62.2%(28/45),其中单支17例(37.8%),双支25例(55.6%),三支2例(4.4%),缺如1例(2.2%)。结论形成"三分叉"原因之一是人脑Willis动脉环中AcoA的复杂解剖变异造成。Objective To know about the anatomic characteristics of ＂ the Trifurcation＂ of human anterior circle of Willis,so as to provide reference for the cranial base surgery and interventional therapy.Methods Forty-five（90 sides） adult cadaver heads fixed by formalin were dissected under microscope,observed,measured and photographed.Results ＂The Trifurcation＂ was found in 15.5%（7/45） of the specimens.The diameter of the left and right A1 of ACA were different（the difference was 0.5 mm or more） in 6 specimens（13.3%）.One side A1 absence was found in one specimen（2.2%）.The mutation rate of AcoA is 62.2%（28/45）.Examination of AcoA showed single branch in 17（37.8%） specimens,two branches in 25（55.6%）,and three branches in 2（4.4%）,and was absent in one 1（2.2%）.Conclusion The complex variation of the AcoA in the anterior circle of Willis is one of the causes of trifurcation.

关 键 词：WILLIS动脉环 显微解剖 变异 前循环 

分 类 号：R322[医药卫生—人体解剖和组织胚胎学]