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OBSERVATIONS ON THE ANATOMICAL PATERN AND VARIATIONS IN THE CIRCLE OF WILLIS IN MACACA MULATTA
Author(s): 
Pages: 161-167
Year: Issue:  2
Journal: Acta Anatomica Sinica

Keyword:  动脉环Willis大脑前动脉颈内动脉前交通动脉右侧大脑后交通动脉血管直径大脑后动脉Macaca;
Abstract: The arterial circle of Willis at the base of brain was observed in 220 Macaca mu- latta monkeys,The results showed that the anatomy and anomaly in the circle of the monkey were quite similar to that of man.The major difference between monkey and man is the presence of a single common cerebral artery in the former which was fused in front of the Optic Chiasm by the anterior cerebral arteries.The anterior communic- ating artery was present in 40% of specimens.The most frequent anomaly was attenu- ated right anterior cerebral artery in 54 specimens(24.5%).3 circles of artery were incomplete,they results from imperfect development of vessels,but no absence of vessels. The large artery described in Kassell’s report joining bilateral internal carotic arter- ies was not found.
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