Blood Supply to Brain Flashcards
Autoregulation in the brain refers to _
non-neural mechanism by which cerebral arteries dilate or constrict to maintain cerebral perfusion pressure
Just know
- brain blood vessels lack anastamoses
- arteriosclerosis is a common finding in people over 50
- no effects until 75% occlusion
n/a
What are the effects of low ocygen and high CO2 on cerebral blood flow?
Increases the blood flow
The 3 major arteries that supply the spinal cord are _
Anterior spinal
2 posterior spinal
The segmental radicular arteries that supply the SPC arise from _ (3)
Vertebral arteries
Posterior intercostals
lumbar arteries
Anastamoses formed between the radicular arteries and the anterior or posterior spinal arteries are _
Spinal medullary arteries
The watershed zone within the spinal cord exist where? What is the blood supply?
Between C8-T9
Great radicular artery of Adamkiewicz
The major supply of blood to the brain comes from _(2)
Internal carotid (from common carotid) Vertebral arteries (from subclavian)
The basilar artery is the main blood supply to the _. It is formed by the anastamosis of which vessels/
Brainstem
Vertebral arteries
Why are left sided strokes more common than right sided strokes?
Emboli are more likely to form in the left auricle and ascend the left common carotid
The MCA and ACA are the 2 main branches of _
Internal carotid.
MCA - Lateral frontal, temporal and parietal lobes
ACA- Medial frontal and parietal lobes
A pie shaped infarct is most likely due to _
Occulsion of a secondary branch of the MCA
The caudate, putamen and the internal capsule are supplied by _. This branches of _
Lenticulo-striate
MCA
Sensory and motor areas above the hip are supplied by _. Sensory and motor below the hip supplied by _
MCA
ACA
The thalamus, amygdala, hippocampus, globus palidus, optic tract, LGN are supplied by _
Anterior choroidal artery
