Control L5 blood supply Flashcards
What are the most common pathologies affecting the cerebrum?
Vascular lesions e.g. TIA and stroke
Tumours
Abscess
Hydrocephalus
When is a stroke classed as a TIA?
When the vascular deficit lasts less than 24 hours
What are the two main arteries supplying the brain?
The vertebral artery and internal carotid artery
What do the vertebral arteries fuse to become once in the brain?
The basilar artery
Where does the vertebral artery arise from?
The subclavian artery
What arteries supply the CNS from the vertebral arteries?
Anterior (x1) and posterior (x2) spinal arteries
PICA (posterior inferior cerebella artery)
Basilar artery
What arteries supply the brain from the basilar artery?
AICA (anterior inferior cerebella artery)
(Transverse) Pontine arteries
SCA (superior cerebella artery)
PCA (posterior cerebral arteries)
What arteries supply the CNS from the internal carotid artery?
MCA (middle cerebral artery)
ACA (anterior cerebral artery)
What anastomoses connects the internal carotid arterial system and the vertebrobasillic arterial systems?
Arterial anastomotic circle aka the circle of Willis
What are two of the anastomoses on the circl of Willis?
The anterior and posterior communicating arteries
What is an advantage of the circle of Willis?
Ensures compensation of blood flow if one vessel is occluded?
There can be variations in the circle of Willis between individuals. True or false?
True
What arteries form the circle of Willis?
anterior communicating artery
Anterior cerebral artery (x2)
Middle cerebral artery (x2)
Posterior communicating artery (x2)
Basilar artery
What is a common site of berry aneurysms?
Areas with lots of arterial branching e.g. the circle of Willis
What percentage of vascular strokes are caused by berry aneurysms?
10%