THE OBSERVATION OF THE BEGINNING PART OF THE VERTEBRAL ARTERY
- VernacularTitle:椎动脉起始部的观察
- Author:
Ningsang TSOU
;
Hongyi LIN
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
-
Abstract:
One hundred branched cadavers were dissected in order to observe the morphological character of the beginning part of the vertebral artery. There are 193 cases (96.5?1.3％) out of 200 sides in which the vertebral artery takes its origin from the subclavian artery. According to the position of the origin, they may be classified into three groups: 1) in the first group it takes its origin just on the arch of the subclavian artery, out of 193 sides, 159 belong to this group, 2) in the second group, the vertebral artery originates immediately before the subclavian artery going over to form the arch; out of 193 sides, 28 belong to this group, 3) The remaining 6 belong to the third group in which the vertebral artery takes its origins from the medial wall of subclavian artery, which already lies in the cavum thorax. The verteral arteries with abnormal origins were 7 (3.5?1.3％) in number, being 1 case on the right and 6 cases on the left. Owing to the difference of the origin of the vertebral artery, the angle formed by the vertebral artery and the subclavian artery is not the same. In our specimens, the angle on the right side is usually greater than that on the left side. The most mommon foramen for the entrance of the vertebral artery is found to be the 6th foramen transversarium. The 5th, 4th and 7th came next in order. Their percentages are 93.5?1.7, 3.5?1.3, 2.0?0.9 and 1?0.7 respectively. This article has also dealt with the calibre and the surface anatomy of the origin of the vertebral artery.
