The trigonum arteriae vertebralis is a triangular anatomical area of the neck and is formed by three short neck muscles.
Anatomy
The trigonum arteriae vertebralis is bounded by the following three muscles:
Within the trigonum arteriae vertebralis, the vertebral artery lies on the arcus posterior (atlantis). The first cervical nerve lies between the vertebral artery and the posterior arch of the atlas; its dorsal ramus reaches the aforementioned muscles as the suboccipital nerve and innervates them[^1].