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Indian Journal of Clinical Anatomy and Physiology

Variations in the configuration of the posterior cerebral circulation in the adult human cadavers

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Author Details: M. Janardhan Rao, BH Shiny Vinila, M. Yesender

Volume : 4

Issue : 4

Online ISSN : 2394-2126

Print ISSN : 2394-2118

Article First Page : 441

Article End Page : 445


Introduction: The knowledge on the incidence of the different configurations of posterior cerebral circulation of brain is of great value to the neurosurgeons while dealing with the cerebrovascular diseases as the fetal configuration and other variations such as absence or hypoplasia of posterior communicating artery or hypoplasia of posterior cerebral artery may lead to ischemia of posterior part of the brain. As the posterior cerebral vessels have a significant clinical importance, the present research was carried out on the incidence of different configurations and variations of posterior cerebral circulation.
Materials and Method: The present study comprised of 40 adult human brains consisting of 30 male and 10 female. In all the brains, the circle of Willi’s was observed to note the variations and the type of configurations of posterior cerebral circulation.
Results: The posterior cerebral circulation was observed as the adult, fetal and transitional configurations and the incidence were 57.5%, 18.75%, and 1.25% respectively. The posterior communicating artery was absent in 22.5%. The presence of additional hypoplastic vessel connecting the posterior communicating artery and the posterior cerebral artery was observed in 2.5%.
Conclusion: The knowledge on the variations and the incidence of the different configurations of posterior cerebral circulation would be helpful to the neurovascular surgeons while dealing with the cerebrovascular diseases.

Posterior cerebral circulation, Circle of Willi’s, Circulus Arteriosus, Posterior cerebral artery, Posterior communicating artery, Brain