Vertebrobasilar circulation refers to the blood flow in the posterior part of the brain, primarily supplied by the vertebral arteries and the basilar artery. These arteries branch off from the subclavian arteries and travel up the neck, merging to form the basilar artery at the base of the brain. This circulation is crucial for delivering oxygen and nutrients to vital brain structures, including the brainstem and cerebellum. The vertebrobasilar system is essential for various functions, such as balance, coordination, and vital life functions like breathing and heart rate. Disruptions in this circulation can lead to serious conditions, including vertebrobasilar insufficiency or strokes, which can significantly impact neurological health.