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The mechanisms triggering haemorrhage into the retropharyngeal space are thought to be due to injury to the longus colli muscles on the anterior surface of the vertebral bodies, the anterior longitudinal ligament or the anterior muscular and spinal branches of the vertebral artery (3).
The vascular supply to the spinal cord is derived from two sources: arteries from the vertebral system superiorly, and spinal branches of the aorta, subclavian and iliac arteries inferiorly.