Basilar artery fenestration is a normal variant seen in about 1% to 5% of autopsy studies and in less than 1% of angiographic studies. It is believed to be the result of incomplete fusion of paired longitudinal neural arteries during early gestation2 and typically occurs at the vertebrobasilar junction.
What is fenestration in the brain?
Intracranial arterial fenestration refers to segmental duplication of the intracranial arteries. They may be contrasted to arterial duplication, which consists of two distinct vessels with separate origins and no downstream convergence.
What is fenestration of the basilar artery?
Basilar artery fenestration (or more simply, basilar fenestration) is the most common intracranial arterial fenestration and most common congenital anomaly of the basilar artery. This anatomic variant is characterized by duplication of a portion of the artery that are connected proximally and distally.
What does fenestrated mean medical?
Medical Definition of fenestration 1a : a natural or surgically created opening in a surface. b : the presence of such openings. 2 : a surgical procedure that involves cutting an opening in the bony labyrinth between the inner ear and tympanum to replace natural fenestrae that are not functional (as in otosclerosis)
What is a vertebral artery dissection?
Vertebral artery dissection (VAD) is a flap-like tear of the inner lining of the vertebral artery, which is located in the neck and supplies blood to the brain. After the tear, blood enters the arterial wall and forms a blood clot, thickening the artery wall and often impeding blood flow.
Are arteries fenestrated?
Fenestration of a cerebral artery is a type of rare congenital vascular dysplasia. It is characterised by the division of an artery, with two distinct endothelium-lined channels within the lumen of a single artery. 1 Among cerebral arteries, basilar artery fenestration is the most common form of fenestration.
Where does the blood come from just before the basilar artery?
The two vertebral arteries and the basilar artery are known as the vertebral basilar system, which supplies blood to the posterior part of the circle of Willis and joins with blood supplied to the anterior part of the circle of Willis from the internal carotid arteries….
| Basilar artery | |
|---|---|
| FMA | 50542 |
| Anatomical terminology |
What is a fenestration procedure?
Fenestration closure after a Fontan operation is a procedure to close the hole between your child’s heart and the tunnel that takes oxygen-poor blood from the body to the lungs. The procedure is done in the heart catheterization lab. There is a small risk that your child will have complications from the procedure.
What is called fenestration give two examples?
Fenestration refers to the openings in the building envelope, including the installation of windows, doors, and skylights. Windows, doors, and skylights are all vital components of the building envelope. The process of including these openings in the building envelope is known as fenestration.
What is the most common cause of vertebral artery dissection?
[4][5][6]Blunt trauma to the neck is the most common reported precipitating event. Patients with connective tissue disorders are also at increased risk. Ehlers-Danlos syndrome is the most common connective tissue disorder that can cause vertebral artery dissection.
What is the prevalence of basilar artery fenestration?
Basilar artery fenestration has been found in 0.6% of angiographic examinations and approximately 5% of autopsies [3-4]. The basilar artery is formed by the fusion of paired longitudinal neural arteries during the 5th gestational week; as this fusion progresses, bridging arteries that temporarily connect the longitudinal neural arteries regress.
Where is the basilar artery located in the brain?
The basilar artery runs cranially in the central groove of the pons towards the midbrain within the pontine cistern. It travels within this groove from the lower pontine border adjacent to the exit of the abducens nerve to the upper pontine border and the appearance of the oculomotor nerve.
How is the basilar artery formed during pregnancy?
The basilar artery is formed by the fusion of paired longitudinal neural arteries during the 5th gestational week; as this fusion progresses, bridging arteries that temporarily connect the longitudinal neural arteries regress. If the bridging arteries fail to regress, the result is fenestration of the basilar artery [2].
Where does the basilar artery cross the pons?
The basilar artery runs cranially in the central groove of the pons towards the midbrain within the pontine cistern. It travels within this groove from the lower pontine border adjacent to the exit of the abducens nerve to the upper pontine border and the appearance of the oculomotor nerve. It bifurcates at the upper pontine border.
