The vertebrobasilar system is a network of arteries located at the back of the brain. It is formed by the vertebral arteries and the basilar artery, which supply blood to important areas, including the brainstem, cerebellum, and parts of the cerebrum. This system plays a crucial role in maintaining proper brain function and overall neurological health. The vertebral arteries arise from the subclavian arteries and merge to form the basilar artery at the base of the brain. Blood flow through the vertebrobasilar system is essential for processes such as balance, coordination, and vital functions like breathing and heart rate regulation.