ANATOMICAL STUDY OF ARTERIAL BLOOD SUPPLY OF THE THORACOLUMBAR PART OF THE SPINAL CORD IN THE GUINEA PIG

摘要

The aim of this study was to describe the arterial blood supply of the thoracolumbar spinal cord in guinea pigs. The study was carried out on twenty adult English self guinea pigs. The arterial system of the thoracolumbar spinal cord was injected by using Batson’s corrosion casting kit no. 17. The branches entering the ventral spinal artery along the entire thoracic and lumbar spinal regions, we observed as left-sided in 63.8 % and as rightsided in 36.2 % of the cases. In 60 % of the cases, the artery of Adamklewicz arose from the left fifth lumbar artery. In 30 % of the cases, the artery of Adamklewicz originated from the fifth right-sided and fourth left-sided lumbar artery. In 10 % of the cases, the artery of Adamklewicz originated from the right and left fifth lumbar arteries. The dorsal branches along the entire thoracic and lumbar spinal regions, were left-sided in 56.8% of the cases and right-sided in 43.2% of the cases. On the dorsal surface, we found two irregular longitudinal dorsal spinal arteries lying in the sulcus lateralis dorsalis bilaterally in 60 % of the cases and in 40 % of the cases there were present three irregular longitudinal dorsal spinal arteries receiving the dorsal branches of the rami spinales. Based on our results,we can conclude that there is a high variability of the blood supply in the thoracolumbar part of the spinal cord in guinea pigs.