JOURNAL OF NEUROSURGERY-SPINE, vol.5, no.1, pp.50-52, 2006 (SCI-Expanded)
Object. The groove for the vertebral artery (VA) may be bridged on C-1, forming a canal through which the artery passes. Because this variant may significantly affect the commonly performed C-1 posterior laminectomy, the authors studied the incidence and radiological appearance of this anatomical feature in surgical specimens.