The basilar artery is a major blood vessel located at the base of the brain. It is formed by the union of the two vertebral arteries, which run along the spine. The basilar artery supplies blood to important areas of the brain, including the brainstem and the cerebellum, which are crucial for vital functions such as breathing, heart rate, and coordination. This artery branches into several smaller arteries, including the posterior cerebral arteries, which further supply blood to the occipital lobe and parts of the temporal lobe. Proper blood flow through the basilar artery is essential for maintaining brain health and function.