Variations in the Location of Basilar Artery on Ventral Surface of Pons

Anjuman Ara Sultana, S. Ara, Mushfika Rahman, H. Afroz, Rahanur Akter, F. Akter, K. Fatema
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Abstract

Context: Basilar artery is formed by the union of right & left vertebral arteries at the lower border of pons / mid medullary level which courses upward along ‘Basilar groove’ on the anterior surface of pons & 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 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. To identify whether there is any variations in the location of basilar artery in relation to basilar groove on the ventral surface of pons . Materials and Methods: A cross-sectional descriptive type of study was carried out in the Department of Anatomy, Dhaka Medical College, Dhaka, from January 2010 to December 2010. Seventy(70) postmortem basilar arteries were collected from unclaimed dead bodies that were under examination in the morgue of Department of Forensic medicine, Dhaka Medical College Dhaka. The study was approved by the Ethical Review Committee (ERC) of Dhaka Medical College. The position of basilar artery in all the samples were either in the midline, right to midline or left to midline. Formalin fixed brain was washed with plain tap water to remove excess formalin and was kept on metallic tray. Location of basilar artery was examined carefully by hand magnifying glass and noted. Results: In the present study, location of basilar artery was found at midline in 70% brain, right to midline in 17%, left to midline in 13%. Conclusion: Further studies in large scale for preparing a database of anatomy of basilar artery are recommended. DOI: http://dx.doi.org/10.3329/bja.v11i2.20673 Bangladesh Journal of Anatomy, July 2013, Vol. 11 No. 2 pp 68-70
基底动脉在脑桥腹表面位置的变化
背景:基底动脉是由左右椎动脉在脑桥下缘/髓中水平的结合形成的,它沿着脑桥前表面的“基底沟”向上走行,供应脑后颅窝内的解剖结构。威利斯环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。确定基底动脉在桥腹表面基底沟的位置是否有变化。材料和方法:横断面描述性研究于2010年1月至2010年12月在达卡医学院解剖学系进行。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。所有样本基底动脉的位置都在中线、右中线或左中线。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位置并记录。结果:颅底动脉位于中线者占70%,右至中线者占17%,左至中线者占13%。结论:为建立基底动脉解剖数据库,建议进一步开展大规模的研究。DOI: http://dx.doi.org/10.3329/bja.v11i2.20673孟加拉解剖学杂志,2013年7月,Vol. 11 No. 2 pp 68-70
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