Human basilar artery: morphology & variations

IF 0.4 Q4 MEDICINE, RESEARCH & EXPERIMENTAL AIMS Medical Science Pub Date : 1900-01-01 DOI:10.3934/medsci.2020017
Asha Usha Vijayakumar, M. Sudhakaran, Leelabhai Janaki Yovel
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引用次数: 1

Abstract

Introduction: Basilar artery is an unpaired medium-sized artery formed by the confluence of right and left vertebral arteries at the pontomedullary junction and extends to the pontomesencephalic junction. It forms the spine of posterior cerebral circulation which is constituted by the vertebrobasilar system and its branches. Normal morphology of the basilar artery forms an essential component of cerebral circulation. The present study aims to measure the level of formation & termination, length, diameter, and angle of formation of the basilar artery. The data presented are relevant to understanding human variations and would be a good anatomical reference for clinicians, anatomists, and medical students. Caliber, length, and angle of bifurcation of the basilar artery help in assessing the feasibility and approach for various surgical procedures and predict cerebro-vascular diseases. Materials & methods: 96 adult human brain specimens were studied. (78 male, 18 female) (Age range: 19–80 y; Average age: 47.66 y). Measurements were taken using Vernier calliper. Data was analysed using Microsoft Excel and SPSS software version 17. Results: The basilar artery was formed by the confluence of two vertebral arteries in all specimens extending from the pontomedullary junction to the pontomesencephalic junction in 2/3rd of the cases. The left vertebral artery was found to be dominant in 62.5% specimens. The basilar artery showed an average length of 3.1 cm (demonstrating positive correlation with age), average diameter of 3.6–3.9 mm at different levels, and average angle of formation as 65.38o in males and 62.22o in females. Fetal type posterior cerebral artery was noticed in 9.4% cases. 3.1% and 6.3% cases were seen on the right and left sides respectively. Basilar artery fenestration was noted in 2 percent specimens. Conclusion: Basilar artery morphology was studied in 96 human adult cadavers. Basilar artery formation and termination was normal in more than 2/3rd cases. Variations were noted in its origin, vessel hypoplasia, presence of fenestrations, and fetal patterns. The data obtained from this study are relevant for anatomists, medical students, interventional radiologists, and neurosurgeons.
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人基底动脉:形态和变异
基底动脉是左右椎动脉在桥髓交界处汇合形成的一条不配对的中等动脉,延伸至桥髓交界处。它形成了由椎基底系统及其分支组成的脑后循环脊柱。基底动脉的正常形态是脑循环的重要组成部分。本研究旨在测量基底动脉的形成和终止水平、长度、直径和形成角度。所提出的数据与理解人类变异有关,并将为临床医生、解剖学家和医学生提供良好的解剖学参考。基底动脉分叉的口径、长度和角度有助于评估各种外科手术的可行性和方法,并预测脑血管疾病。材料与方法:对96例成人脑标本进行了研究。(男78人,女18人)(年龄19-80岁;平均年龄:47.66岁),测量使用游标卡尺。数据分析采用Microsoft Excel和SPSS version 17软件。结果:基底动脉由两根椎动脉汇合形成,三分之二的病例从桥髓连接处延伸至桥脑前连接处。62.5%的标本以左椎动脉为主。基底动脉平均长度为3.1 cm(与年龄呈正相关),不同程度基底动脉平均直径为3.6-3.9 mm,男性平均形成角度为65.38°,女性平均形成角度为62.22°。胎儿型大脑后动脉占9.4%。右侧和左侧分别占3.1%和6.3%。在2%的标本中发现基底动脉开窗。结论:对96具成人尸体的基底动脉形态进行了研究。超过2/3的病例基底动脉形成和终止正常。其起源、血管发育不全、开窗和胎儿形态均有差异。从这项研究中获得的数据与解剖学家、医学生、介入放射科医生和神经外科医生相关。
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来源期刊
AIMS Medical Science
AIMS Medical Science MEDICINE, RESEARCH & EXPERIMENTAL-
自引率
14.30%
发文量
20
审稿时长
12 weeks
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