Which artery forms part of the posterior circulation by joining to create the basilar artery?

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Multiple Choice

Which artery forms part of the posterior circulation by joining to create the basilar artery?

Vertebral arteries are the vessels that unite to form the basilar artery, establishing the posterior circulation. They travel up through the neck, enter the skull, and merge at the level of the brainstem (the pontomedullary junction) to create a single basilar artery. From there, the basilar artery supplies the brainstem, cerebellum, and posterior cerebral regions. The internal carotid arteries primarily contribute to the anterior circulation (often via posterior communicating branches to reach the posterior circulation), while the external carotids supply facial and scalp regions. So the artery that joins to form the basilar artery is the vertebral arteries.

Vertebral arteries are the vessels that unite to form the basilar artery, establishing the posterior circulation. They travel up through the neck, enter the skull, and merge at the level of the brainstem (the pontomedullary junction) to create a single basilar artery. From there, the basilar artery supplies the brainstem, cerebellum, and posterior cerebral regions. The internal carotid arteries primarily contribute to the anterior circulation (often via posterior communicating branches to reach the posterior circulation), while the external carotids supply facial and scalp regions. So the artery that joins to form the basilar artery is the vertebral arteries.

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