Origin of the anterior spinal artery
- 1 September 1996
- journal article
- Published by Springer Nature in Surgical and Radiologic Anatomy
- Vol. 18 (3) , 189-193
- https://doi.org/10.1007/bf02346126
Abstract
This investigation was designed to extend our present knowledge of the origin of the anterior spinal a. and is based on 80 brains of human cadavers. The anterior spinal a. is usually formed rostrally by the union of the anterior spinal branches from the intracranial segments of the vertebral aa. In this study, we observed three different locations of the origin of the anterior spinal a. Each type has different characteristics. A bilateral origin (type I) was present in 60 specimens (75%). This type could be further subdivided according to the caliber of the arteries, into the following subtypes: “balanced” (type Ia 42.5%), right-dominated (type Ib 17.5%), and left-dominated (type Ic 15%). A unilateral origin (type II) was found in 9 specimens (11.3%), and an origin in an intervertebral transverse anastomosis was demonstrated in 11 (13.8%). In all cases, the anterior spinal a. had an average caliber of 1.145±0.12 mm. Cette recherche destinée à élargir les connaissances actuelles sur l'origine de l'a. spinale antérieure repose sur 80 cerveaux de cadavres humains. L'a. spinale antérieure est habituellement formée rostralement par l'union des rameaux spinaux antérieurs issus de la partie intracrânienne des aa. vertébrales. Dans cette étude, nous avons observé trois modalités différentes de l'origine de l'a. spinale antérieure. Chaque type a ses propres caractéristiques. Une origine bilatérale (type I) existait sur 60 spécimens (75 %); ce type peut être subdivisé selon le calibre des artères en 3 sous-types: équilibré (type Ia, 42,5 %), à prédominance droite (type Ib, 17,5 %), et à dominance gauche (type Ic, 15 %). Une origine unilatérale (type II) a été vue sur 9 spécimens (11,3 %). Enfin l'a. spinale antérieure naissait d'une anastomose transversale intervertébrale dans 11 cas (13,8 %). L'a. spinale antérieure avait un diamètre moyen de 1,145+0,12 mm.Keywords
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