The basilar artery is part of the posterior cerebral circulation. It arises from the confluence of the left and right vertebral arteries at the base of the pons as they rise towards the base of the brain.
How is basilar artery formed?
The basilar artery is part of the blood supply system for the brain and central nervous system. It is formed where the two vertebral arteries join at the base of the skull. The basilar artery carries oxygenated blood to the cerebellum, brainstem, and occipital lobes.
Which arteries form the basilar artery?
The basilar artery lies at the front of the brainstem in the midline and is formed from the union of the two vertebral arteries. The basilar artery terminates by splitting into the left and right posterior cerebral arteries.
What brain region do you see the basilar artery over?
The superior cerebellar artery is derived from the basilar artery near the pons-midbrain junction. In most specimens the basilar artery branches caudal to the mammillary bodies to form the posterior cerebral arteries.
Which cistern does the basilar artery run through?
The basilar artery is formed by the union of the two vertebral arteries, which takes place at the lower border of the ventral pons (see Fig. 22‐6). It continues superiorly to terminate in the interpeduncular cistern by dividing into the PCAs.
What is a basilar stroke?
Basilar artery occlusions (BAOs) are a subset of posterior circulation strokes. Particular issues relevant to BAOs include variable and stuttering symptoms at onset resulting in delays in diagnosis, high morbidity and mortality, and uncertain best management.
What is basilar artery syndrome?
Abstract. Infarction of rostral brainstem and cerebral hemispheral regions fed by the distal basilar artery causes a clinically recognizable syndrome characterized by visual, oculomotor, and behavioral abnormalities, often without significant motor dysfunction.
Is there a right and left basilar artery?
The basilar artery is a midline structure formed from the confluence of the vertebral arteries. Terminally, the basilar artery branches to establish the right and left posterior cerebral arteries.
Which two arteries fuse to form the basilar artery?
The internal carotid artery divides into the anterior and middle cerebral arteries. The paired vertebral arteries fuse at the caudal border of the pons to form the basilar artery.
How do you tear your basilar artery?
These findings indicate that when the man fell into the ditch, severe hyperextension occurred as a result of minor blunt forces to the face, and that the traumatic tear of the basilar artery was mechanically caused by overstretching due to hyperextension of the head.
How do you get a tear of the basilar artery in the brain stem?
A stroke that occurs in the brainstem is either caused by a blood clot or hemorrhage. In some cases, a brainstem stroke may be the result of an injury to an artery as a result of sudden head or neck movement. Similar to risk factors for stroke, causes of a basilar artery stroke include the following: Smoking.
What causes tear of the basilar artery in the brain stem?
Basilar artery infarct or occlusion results from the obliteration of blood supply to the posterior circulation or vertebrobasilar system of arteries to the brain. Approximately 20%-25% of all acute strokes occur in the posterior circulation. The most common causes are atherosclerosis or thromboembolism.
What is the meaning of basilar?
adjective. pertaining to or situated at the base, especially the base of the skull.
What are the basilar cisterns?
The subarachnoid cisterns, or basal cisterns, are compartments within the subarachnoid space where the pia mater and arachnoid membrane are not in close approximation and cerebrospinal fluid (CSF) forms pools or cisterns (Latin: “box”). As they are interconnected, their patency is essential for CSF circulation.
What is basilar artery occlusion?
When the basilar artery is occluded, clinical presentation ranges from mild transient symptoms to devastating strokes. Basilar artery occlusion (BAO) is rare. It accounts for about 1% of all strokes and is reported in about 8% of patients with symptomatic vertebrobasilar territory ischaemia.
What are Paramedian branches of basilar artery?
The basilar artery is the principal supplier of the pons. It gives off three types of branches. The paramedian arteries supply the medial basal pons, including the pontine nuclei, corticospinal fibers, and medial lemniscus.