Akademik Veri Yönetim Sistemi
JOURNAL OF NEUROSURGERY-SPINE, cilt.1, sa.3, ss.299-305, 2004 (SCI-Expanded)
Object. The goal of this study was to demonstrate the origins. courses. anastomoses. and target tissues of the anerial branches that arise from the V-2 segment of the vertebral artery. Methods. Ten adult cadaveric necks (20 V-2 segment specimens) were examined (magnification X 40) after injection of colored silicon. The branches at each cervical level were classified in a new system according to anatomical features and tar-et tissues-anterior, posterior, medial. and lateral. Incidence with which each branch category was observed at each cervical level was calculated. Anterior branches were observed at C-3 in all 20 V-2 segment specimens. The incidence with which the posterior branch was present at C-4 was 45%. whereas the corresponding rates at segments superior and inferior were lower. The medial V-2 segment branches were assessed in four subcategories. The anterior spinal artery was present at C-3 in all specimens, whereas the mean incidence at the C4-6 level was 46.7%. The posterior spinal artery was most frequently detected at C-3 (60%). The anterior radicular artery (RA) was present at C-5 in 50% of the specimens. whereas the posterior RA was detected at C-5 in only 35%. Lateral branches were most frequently detected at C-3. Conclusions. The authors provide detailed anatomical information about the origins. Courses. anastomoses. and target tissues of the vessels that arise from the V-2 segment. This new classification allows for better understanding of die vasculature of the C3-6 region.