The basilar artery is a single |artery| located at the base of the |skull|. It is formed by the junction of two vertebral arteries. It supplies ~blood~ to the internal |ear| and parts of the |brain|. The basilar plexus is a network of small arteries between the layers of membrane that protect the |brain| (the |dura mater|) over the base of the |skull|. Blockage, or occlusion, of the basilar artery causes many serious problems, ranging from |blindness| to |paralysis|.