open access

Vol 77, No 4 (2018)
ORIGINAL ARTICLES
Published online: 2018-04-10
Submitted: 2018-01-17
Accepted: 2018-03-14
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Variability of the vertebral artery origin and transverse foramen entrance level — CT angiographic study

S. Vujmilović, G. Spasojević, S. Vujnović, S. Malobabić, Z. Vujković
DOI: 10.5603/FM.a2018.0036
·
Pubmed: 29651795
·
Folia Morphol 2018;77(4):687-692.

open access

Vol 77, No 4 (2018)
ORIGINAL ARTICLES
Published online: 2018-04-10
Submitted: 2018-01-17
Accepted: 2018-03-14

Abstract

Background: Vertebral artery (VA), the main element of the posterior brain circulation, has many anatomical variations which generally were widely investigated. However, available data vary in wide ranges, reflecting very different sample sizes, lack of data about left-right or sex differences, and about possible ethnic, regionally specific or genetic differences.

Materials and methods: Certain new findings suggest possible involvement of some environmental factors in VA variations. Accurate anatomical data about VA variations in different regions of the world, including Balkans countries, are still lacking. Therefore we investigated morphological variability of VA origin and its entrance level into cervical transverse foramina in population of Republika Srpska (Bosnia and Herzegovina), including data about the sex and side.

Results: Anatomy of VA was investigated in 112 persons (224 arteries) of both sexes (58 males, 54 females; age 19–83 years), using 64-slice computed tomography (CT) scanner. Origin of VA from subclavian artery (SCA) we found in 95.08% of arteries (52 males, 49 females). Only in 1 (0.45%) male left VA and left SCA had an specific origin from aortic arch (AA), which we named as an “common area of origin”. All other observed variations in origin were only of left VA, originating from AA in 4.47% (5 males, 5 females). Left VA most often (usual) entrance level into transverse foramen we found at C6 (87.5%), followed by C5 (8.93%), C4 (3.12%), and in 1 case at level C7 (0.45%). Entry levels at C5, both on right and on the left side, were three times more frequent in males than in females.

Conclusions: Wide ranges of differences between the data we obtained on a sample in Republika Srpska (Bosnia and Herzegovina) and the data from many other studies require further and wider investigations.

Abstract

Background: Vertebral artery (VA), the main element of the posterior brain circulation, has many anatomical variations which generally were widely investigated. However, available data vary in wide ranges, reflecting very different sample sizes, lack of data about left-right or sex differences, and about possible ethnic, regionally specific or genetic differences.

Materials and methods: Certain new findings suggest possible involvement of some environmental factors in VA variations. Accurate anatomical data about VA variations in different regions of the world, including Balkans countries, are still lacking. Therefore we investigated morphological variability of VA origin and its entrance level into cervical transverse foramina in population of Republika Srpska (Bosnia and Herzegovina), including data about the sex and side.

Results: Anatomy of VA was investigated in 112 persons (224 arteries) of both sexes (58 males, 54 females; age 19–83 years), using 64-slice computed tomography (CT) scanner. Origin of VA from subclavian artery (SCA) we found in 95.08% of arteries (52 males, 49 females). Only in 1 (0.45%) male left VA and left SCA had an specific origin from aortic arch (AA), which we named as an “common area of origin”. All other observed variations in origin were only of left VA, originating from AA in 4.47% (5 males, 5 females). Left VA most often (usual) entrance level into transverse foramen we found at C6 (87.5%), followed by C5 (8.93%), C4 (3.12%), and in 1 case at level C7 (0.45%). Entry levels at C5, both on right and on the left side, were three times more frequent in males than in females.

Conclusions: Wide ranges of differences between the data we obtained on a sample in Republika Srpska (Bosnia and Herzegovina) and the data from many other studies require further and wider investigations.

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Keywords

vertebral artery, anatomy, variations, origin, level, transverse foramina

About this article
Title

Variability of the vertebral artery origin and transverse foramen entrance level — CT angiographic study

Journal

Folia Morphologica

Issue

Vol 77, No 4 (2018)

Pages

687-692

Published online

2018-04-10

DOI

10.5603/FM.a2018.0036

Pubmed

29651795

Bibliographic record

Folia Morphol 2018;77(4):687-692.

Keywords

vertebral artery
anatomy
variations
origin
level
transverse foramina

Authors

S. Vujmilović
G. Spasojević
S. Vujnović
S. Malobabić
Z. Vujković

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