Question: What Does The Basilar Artery Do?

What two 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..

How do you tear a 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.

What is a basilar aneurysm?

Over 90% of aneurysms occur in the circle of Willis and in the proximal middle cerebral artery. An aneurysm is caused by a focal weakening and thinning of the arterial wall. Rupture of an aneurysm can result in subarachnoid hemorrhage but it can also produce intracerebral hemorrhage and necrosis.

Where does the blood go after it leaves the basilar artery?

It provides blood to the posterior portion of the cerebrum and brain stem. The basilar artery is an anastomosis that begins at the junction of the two vertebral arteries and sends branches to the cerebellum and brain stem. It flows into the posterior cerebral arteries.

What is basilar artery dissection?

Introduction. Basilar artery dissections (BADs) are rare lesions and little is known about its natural history. The clinical presentations of BADs are subarachnoid hemorrhage (SAH), brain ischemia, and brainstem compression. Ruptured BADs presenting with SAH seemed to have higher mortality rate than unruptured ones.

Where does the basilar artery come from?

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. Along its course, the basilar artery gives off several branches.

What is basilar artery stenosis?

Intracranial stenosis is the narrowing of an artery inside the brain due to buildup of plaque inside the artery. The arteries most likely to be affected by stenosis are the internal carotid artery, the middle cerebral artery, the vertebral arteries, and the basilar artery.

What is lock syndrome?

Locked-in syndrome is a rare neurological disorder in which there is complete paralysis of all voluntary muscles except for the ones that control the movements of the eyes.

Is the basilar artery intracranial?

The basilar artery is a relatively large, robust blood vessel located in the posterior cranial fossa. It is the main blood vessel that forms the posterior circulation of the brain….Basilar artery.OriginUnion of the vertebral arteries at the pontomedullary junctionTerminationBifurcates into the paired posterior cerebral arteries2 more rows

What are the symptoms of vertebral artery dissection?

The symptoms of vertebral artery dissection include head and neck pain and intermittent or permanent stroke symptoms such as difficulty speaking, impaired coordination and visual loss. It is usually diagnosed with a contrast-enhanced CT or MRI scan.

What happens if the basilar artery is damaged?

Interruption of the blood flow through the basilar artery can lead to severe brain damage, organ malfunction, or even death. An aneurysm, or bulge in the artery wall, may push that portion of the brain, causing rupture and hemorrhage (bleeding).

What supplies the basilar artery?

The basilar artery, a median vessel (0.36 mm in diameter) resulting from the fusion of the two vertebral arteries (0.34 mm in diameter), runs over the ventral surface of the brain stem and supplies the brain stem and cerebellum (Figs. 3 and 4).

What causes basilar artery tear?

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.

How do you get a tear of the basilar artery in the brain stem?

Most basilar artery strokes are caused by atherosclerosis (hardening of the arteries). The second-leading cause is clots. Leading risk factors for basilar artery strokes are high blood pressure, diabetes, smoking, high cholesterol, coronary artery disease and peripheral vascular disease.

What is a basilar stroke?

Abstract. 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.