Variations in the Site of Formation of Basilar Artery

Bangladesh Journal of Anatomy Pub Date : 2013-12-08 DOI:10.3329/BJA.V10I2.17288

Anjuman Ara Sultana, S. Ara, Mushfika Rahman, H. Afroz, K. Fatema, N. Nahar, R. Alam

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引用次数: 3

Abstract

Context: Basilar artery, supplies the anatomical structures within the posterior cranial fossa of brain. The ‘Circle of Willis’ is the principal arterial anastomotic trunk of brain formed by the anastomosis between the branches of internal carotid arteries and terminal branch of basilar artery. It is responsible for collateral circulation of brain, specially of old people , who have reduced blood supply to brain due to senile arteriosclerosis . Cerebrovascular diseases due to basilar artery is more common in men than women. Anatomy of basilar artery and its branches are very complex and variable. So, detailed morphogical knowledge is essential for proper diagnosis and treatment of neurological disorder. Objective: To identify variations in the site of formation of basilar artery in relation to age. Study Design: A cross-sectional type of study. Place & period of Study : The study was carried out in the Department of Anatomy, Dhaka Medical College, Dhaka, from January 2010 to December 2010. Materials : 70 postmortem basilar arteries were collected from unclaimed dead bodies that were under examination in the morgue of the Department of Forensic Medicine, Dhaka Medical College Dhaka. The study was approved by the Ethical Review Committee (ERC) of Dhaka Medical College. Methods: The samples were divided into three different age groups i.e. Group A (15 -30 years) Group B (31-45 years) and Group C (46-60 years). Formalin fixed brain was washed with plain tap water to remove excess formalin and was kept on metallic tray. Site of formation of basilar artery was examined carefully by hand magnifying glass and noted. Results: In the present study, 72.2% of basilar artery was formed at pontomedullary junction and 35.7% was formed below pontomedullary junction. Conclusion: In the present study, the commonest site of formation of basilar artery was found at ponto medullary junction and 2 nd commonest site was below pontomedullary junction but no formation above pontomedullary junction was found. Further studies to find out the cause and functional / clinical correlations of this variation are recommended. DOI: http://dx.doi.org/10.3329/bja.v10i2.17288 Bangladesh Journal of Anatomy, July 2012, Vol. 10 No. 2 pp 73-75

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基底动脉形成部位的变化

背景:基底动脉，供应脑后颅窝内的解剖结构。“威利斯圈”是脑内动脉分支与基底动脉终支吻合形成的脑主动脉吻合干。它负责大脑的侧支循环，特别是老年人，由于老年性动脉硬化，大脑的血液供应减少。基底动脉引起的脑血管疾病男性多于女性。基底动脉及其分支的解剖结构非常复杂多变。因此，详细的形态学知识对于神经系统疾病的正确诊断和治疗至关重要。目的:探讨基底动脉形成部位与年龄的关系。研究设计:横断面研究。研究地点和时间:研究于2010年1月至2010年12月在达卡医学院解剖学系进行。材料:在达卡医学院法医系太平间检查的无人认领的尸体上收集了70条死后基底动脉。该研究得到了达卡医学院伦理审查委员会(ERC)的批准。方法:将样本分为A组(15 ~ 30岁)、B组(31 ~ 45岁)和C组(46 ~ 60岁)3组。用普通自来水冲洗福尔马林固定脑，去除多余的福尔马林，保存在金属托盘上。用手放大镜仔细检查基底动脉形成部位并记录。结果:72.2%的基底动脉在桥髓交界处形成，35.7%的基底动脉在桥髓交界处以下形成。结论:基底动脉最常见的形成部位为桥髓交界处，其次为桥髓交界处以下，桥髓交界处以上未发现基底动脉形成。建议进一步研究这种变异的原因和功能/临床相关性。DOI: http://dx.doi.org/10.3329/bja.v10i2.17288孟加拉解剖学杂志，2012年7月，Vol. 10 No. 2 pp 73-75

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Bangladesh Journal of Anatomy

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