The Configuration and Variations in the Developing Circle of Willis – A Retrospective Autopsy Study
Journal Title: International Journal of Current Research and Review - Year 2017, Vol 9, Issue 17
Abstract
Introduction: Cerebral hemodynamics undergoes a shift from carotid system to vertebro-basilar system from fetal stage to adult life. The circle of Willis (CW) plays a major role in redistributing the blood and enables interhemispheric flow through the anterior & posterior communicating arteries (AComA, PComA). The text book description mention three stages in the development of CW- fetal, transitional and adult. The purpose of the present study was to observe development of arterial anastomoses during intrauterine life, to note the variations and trying to explain some of the hypothesis for these variations. Material & Method: The material of the present study include 45 fetal brains of different age groups. Variations were observed regarding absence, duplication, bilateral asymmetry and tortuousity. Results: The number and type of variations in fetus were lesser as compared to adults. Anomalies including presence of aneurysm, absence of anterior cerebral artery (ACA) and splitting of a constituent vessel were not observed in fetal brains. However there were incidences of absence / duplication and hypoplasia of a component vessel. During early gestation period, all the cerebral vessels were slender but uniform in size. This is named as fetal stage. After 22nd wks of fertilization, due to rapid development of occipital lobes, there is increase in the diameter of either posterior cerebral artery (PCA) or PComA thereby giving rise to either adult or transitional type of configuration respectively.
Authors and Affiliations
Dr. Jyotsna Singh
Keywords
Related Articles
- EP ID EP608885
- DOI 10.7324/IJCRR.2017.9174
- Views 95
- Downloads 0
Effect of Terminalia chebula and Gallic Acid on Increased Adiposity of High-Fat Diet Induced Hyperlipidemic Mice
Objective: To elucidate the role of Terminalia chebula and Gallic Acid on increased adiposity and as a regulator of Lipogenesis and its associated factors in high-fat diet induced hyperlipidemic mice. Methods: The study...
Correlation between the Type of Arterial Vascularizacion and Presence and Localization of Myocardial Bridges
Introduction: Myocardial bridges represent an anomaly of the coronary arteries’ flow, which can be asymptomatic, or can lead to the coronary insufficiency and its clinical consequences. The aim of this research was to de...
Hemorrhagic risks associated with dental procedure in a rare case of Type II Sturge weber syndrome
Aim: Sturge weber syndrome (SWS) is a sporadic congenital neurocutaneous disorder. It belongs to phakomatoses group of disorders. It is basically combinations of manifestations such as port-wine stains (PWS) of the face,...
Comparative Analysis of Different Modified Advanced Encryption Standard Algorithms over Conventional Advanced Encryption Standard Algorithm
During the recent times, with the tremendous growth of digital data communication over computer network, information content security becomes a prime concern. Internet itself allows many security threats and those can ea...
Pregnancy Induced Hypertension: A Study on Its Multisystem Involvement
Objectives: To evaluate and compare Renal, Hepatic and Coagulation profiles in normotensive pregnant females at 20 weeks or more gestation and in cases of Pregnancy induced Hypertension at same gestation. Methods: The st...