Tracking the Vertebral Artery – Safe Corridors

V2 segment
– entry of VA higher than C6 or through the C7 foramen transversarium
– loops (medial or lateral)
– medial loops (at disc or vertebral body level)

V3 segment (divided into three parts)

V31 – High riding vertebra artery – too high, too posterior or too medial
V32 – VA branches below the C1 arch (extracranial origin of PICA
VA coursing below the C1 arch (persistent first intersegmental artery), or a fenestrated VA
V33 – Ponticulus ponticus, abnormal courses associated with occipitalised atlas


Author: Kshitij Chaudhary

Kshitij Chaudhary is a fellowship-trained spine surgeon working at PD Hinduja Hospital, Mumbai, India. He has been trained in USA at Harvard University's Beth Israel Medical Center, Boston and Twin Cities Spine Center, Minneapolis. Special Interests: 1. Spinal Deformity and Scoliosis Surgery (Pediatric and Adult) 2. Cranio-vertebral and Cervical Spine Surgery 3. Spinal Tumors, Tuberculosis and Infections 4. Degenerative diseases of Lumbar spine 5. Spinal Trauma and Fractures 6. Minimally Invasive Spine Surgery

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