Which vessel is a major vessel within the suboccipital triangle?

Which vessel is a major vessel within the suboccipital triangle?

• A. External carotid artery
• B. Internal thoracic artery
• C. Vertebral artery
• D. Occipital artery

Answer: (C)

The major vessel in the suboccipital triangle is the vertebral artery. This small muscular region contains the vertebral artery as its key vascular structure, along with the suboccipital nerve. The vertebral artery ascends through the transverse foramina of the cervical vertebrae and then curves medially to enter the skull via the foramen magnum, passing deep to the muscles that form the triangle. The other vessels listed are not located within this triangle: the external carotid and its occipital branch travel in the neck and supply the scalp and posterior neck but do not lie inside the suboccipital triangle, and the internal thoracic artery runs in the thorax.

The major vessel in the suboccipital triangle is the vertebral artery. This small muscular region contains the vertebral artery as its key vascular structure, along with the suboccipital nerve. The vertebral artery ascends through the transverse foramina of the cervical vertebrae and then curves medially to enter the skull via the foramen magnum, passing deep to the muscles that form the triangle. The other vessels listed are not located within this triangle: the external carotid and its occipital branch travel in the neck and supply the scalp and posterior neck but do not lie inside the suboccipital triangle, and the internal thoracic artery runs in the thorax.