Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
22 Cards in this Set
- Front
- Back
|
What 2 arteries supply blood to the CNS?
|
-internal carotid arteries
-vertebral arteries |
|
|
What supplies the "anterior circulation"?
|
internal carotid arteries
|
|
|
What supplies the "posterior circulation"?
|
vertebral arteries
|
|
|
Where are the carotid and vertebral arteries connected?
|
-circle of Willis
--also by anastomoses by branches of cerebral arteris |
|
|
What supplies blood to the spinal cord and brainstem?
|
-almost exclusively by the posterior circulation (vertebral arteries)
|
|
|
Apart from the vertebral arteries (basilar artery), what contributes to blood flow here?
|
The spinal arteries help out a little
|
|
|
Where does the midbrain get its blood supply?
|
Mainly the posterior cerebral artery branches and a little from the vertebral(basilar).
|
|
|
Where do the pons and cerebellum get their blood flow?
|
The basilar artery (vertebral)
|
|
|
Where do the diencephalon and telencephalon get their supply of blood?
|
Both the internal coratid and vertebral arteries
-anastomosis takes place to accomplish mixing |
|
|
What are the 3 classifications of branches of the circle of Willis and a couple pts about them?
|
-central (perforating) arteries - supply deep, are small (easily blocked), are usually end arteries
-cortical branches - cover large surface area of cortex, overlap causing anastomoses -choroidal branches - sub-type of branch, supply CSF producing structures like choroid plexi |
|
|
What are the 3 major branches of the ICA (internal carotid artery)?
|
-Ophthalmic tract - supplies the retina - terminal
-ACA (Anterior cerebral artery) - terminal -MCA (middle cerebral artery) artery) - circley |
|
|
What does the ACA supply (anterior cerebral artery)?
|
-most of medial surface of brain
-optic chiasm -AComm (anterior communicating artery) of ACA makes the circle of Willis -corpus callosum |
|
|
What are 4 branches of the Basilar/Vertebral artery?
|
-PCA (posterior cerebral artery)
-SCA (superior cerebellar artery) -AICA (anterior inferior cerebellar artery) -PICA (posterior inferior cerebellar artery) |
|
|
What does the MCA (middle cerebral artery) supply?
|
-thalamus, basal ganglia, auditory cortex, motor/somatosensory cortex, parietal lobe.
-Pcomm (posterior communicating artery) connects MCA and PCA (part of the cirlce of Willis) |
|
|
What does the PCA (posterior cerebral artery) supply?
|
-thalamus, hypothalamus, visual cortex
|
|
|
What are the 2 main branches of the circle of Willis that make it so magical?
|
-AComm - direct connection between the the two sides of the ACA
PComm - connection between MCA and the PCA |
|
|
Where do the vertebral arteries join and become the Basilar artery?
|
the pons medullary junction (the dividing line between pons and medulla)
|
|
|
Why are occlusions and their effects rarer in the venous system of CNS?
|
highly anastomosotic - the interconnections compensate - effects are usually transient
|
|
|
What are the two routes for venous drainage?
|
-Deep - drain for telencephalon and diencephalon
-Superficial - drain for gray and white matter of cerebral cortex |
|
|
Where do the spinal cord and caudal medulla drain?
|
spinal veins into systemic venous return
|
|
|
What are some of the main Superficial vein drains?
|
-superior sagittal sinus
-superficial middle cerebral vein -inferior anastomotic veins |
|
|
What are some of the main Deep vein drains?
|
-thalamostriate vein
-choroidal vein -internal cerebral vein -Great cerebral vein |
