Anat Cell Biol
Published online November 1, 2022
Copyright © Korean Association of ANATOMISTS.
1Department of Basic Sciences, Program of Medicine, Universidad de Caldas, Manizales, 2Department of Basic Sciences, Program of Medicine, Universidad de Manizales, Manizales, 3Department of Animal Health, Faculty of Veterinary Medicine and Zootechnics, Universidad del Tolima, Ibagué, Colombia
Correspondence to:Juan Fernando Vélez García
Department of Animal Health, Faculty of Veterinary Medicine and Zootechnics, Universidad del Tolima, Ibagué 730006299, Colombia
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Based on most neuroanatomical descriptions, the anterior spinal artery (ASA) originates from two small vessels of the vertebral arteries, which are anastomosed just before forming the basilar artery. This study aimed to determine and quantify the possible variants of the origin of the ASA and its trajectory in samples of human brain stems. Male brain stems with the superior portion of the spinal cord until myelomera C3 of 23 adult human, and no evident morphological alterations were selected. The brain stems were collected for three years and fixed in a 10% formalin solution at the Anatomy Laboratory of the Universidad de Caldas (Colombia). Five samples (21.7%) had variations in the origin and trajectory of the anterior spinal artery. The variations in the origin of the ASA could generate morphofunctional advantages instead of leading to complications. That is the case when there are two anterior spinal arteries since it would increase tissue perfusion, thus protecting part of the spinal cord from ischemic pathologies. It is essential to consider the variations that may exist in the supply of the anterior region of the spinal cord for clinical and surgical assessments due to variations in its supplied territory.
Keywords: Anatomy, Blood vessels, Neuroanatomy, Spinal cord