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Clinical Neuroradiology
Published in: Clinical Neuroradiology 1/2018

01-03-2018 | Original Article

Anatomical Features and Clinical Significance of Radiculomuscular Artery Variants Involving the Suboccipital Segment of Vertebral Artery

Angiographic and Cadaver Studies

Authors: Shao-wei Zhu, Yang Yang, Yu-guang Liu, Jing-wei Cao, Feng Li

Published in: Clinical Neuroradiology | Issue 1/2018

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Abstract

Objective

To discuss the significance of the radiculomuscular artery in typical variations of the distal vertebral artery (VA) from the viewpoint of microsurgical anatomy.

Methods

Some variations involving the radiculomuscular artery revealed by digital subtraction angiography (DSA) were recruited and studied together with our findings from cadaver dissections.

Results

A total of 29 variants were found in 26 patients, including 10 C‑2 vertebral origins of the posteroinferior cerebellar artery (PICA), 13 duplicated (12 patients) and 6 aberrant V3s. An aberrant V3 was observed in our cadaver specimen. Each of these variants involved only the distal part of the lateral spinal artery (LSA) that incorporates the radiculomuscular artery and the radiculomedullary branch. Using DSA two aberrant V3s were indicated and another one was verified by anatomical study as an extradural location.

Conclusion

The radiculomuscular artery accounts for the C‑2 vertebral origin of the PICA, duplicated and aberrant V3, and extradural course of an aberrant V3 does exist. A probable extradural course of a variant between C‑2 and C‑1 should be kept in mind whenever each of the variations involving the radiculomuscular artery is detected by DSA or computed tomography angiography (CTA).
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Metadata
Title
Anatomical Features and Clinical Significance of Radiculomuscular Artery Variants Involving the Suboccipital Segment of Vertebral Artery
Angiographic and Cadaver Studies
Authors
Shao-wei Zhu
Yang Yang
Yu-guang Liu
Jing-wei Cao
Feng Li
Publication date
01-03-2018
Publisher
Springer Berlin Heidelberg
Published in
Clinical Neuroradiology / Issue 1/2018
Print ISSN: 1869-1439
Electronic ISSN: 1869-1447
DOI
https://doi.org/10.1007/s00062-016-0520-5

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