成人的 Willis 环。
Circle of Willis in adults.
作者信息
Al-Hussain S M, Shoter A M, Bataina Z M
机构信息
Department of Anatomy, Jordan University of Science and Technology, Irbid.
出版信息
Saudi Med J. 2001 Oct;22(10):895-8.
OBJECTIVE
This study was carried out to describe the main variations of the Circle of Willis and to clarify the clinical importance of these variations, so that practitioners and the students are more alert when dealing with this subject.
METHODS
This work is based on the study of 50 Circles of Willis from adult Jordanians who died from diverse causes without signs of cerebrovascular diseases. The arteries of these circles are drawn and measured with the aid of a stereoscopic microscope provided with a drawing tube.
RESULTS
Fourteen types of Willis polygonals have been identified among which 13 would be assimilated to polygonals already described in previous studies. The 14th is original and seems proper to our series. We have described wide diversity of variations found within these 14 types of Willis polygonals. We presented the frequency of the different variations and discussed the clinical significance of these variations.
CONCLUSION
The variations of the Circle of Willis are very common and they may have important influence on the manifestations and treatment of some diseases that are caused by obstruction of one of the arteries that supply the brain.
目的
开展本研究以描述 Willis 环的主要变异情况，并阐明这些变异的临床重要性，以便从业者和学生在处理该主题时更加警觉。
方法
本研究基于对 50 个来自约旦成年人的 Willis 环进行研究，这些成年人死于各种原因且无脑血管疾病迹象。借助配备绘图管的立体显微镜绘制并测量这些环的动脉。
结果
已识别出 14 种 Willis 多边形类型，其中 13 种可与先前研究中描述的多边形相类比。第 14 种是原创的，似乎是我们这个系列所特有的。我们描述了在这 14 种 Willis 多边形类型中发现的广泛多样的变异情况。我们呈现了不同变异的频率，并讨论了这些变异的临床意义。
结论
Willis 环的变异非常常见，它们可能对某些由供应大脑的动脉之一阻塞所引起疾病的表现和治疗产生重要影响。
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