Blood supply and CSF Flashcards
What 2 main arteries provide blood supply to the brain?
Vertebral and internal carotid
What do 2 vertebral arteries going together form?
Basilar artery
At what junction do the vertebral arteries join?
Pontomedullary junction
Branches of vertebral arteries?
Anterior and posterior spinal arteries.
Posterior inferior cerebellar artery
Branches to the medulla
Where does the basilar artery end?
Ponto-midbrain junction
What does the basilar artery divide into?
Posterior cerebral artery
Branches of basilar artery?
Anterior inferior cerebellar artery and superior cerebella artery.
What does the posterior cerebral artery supply?
Inferior part of temporal lobe and occipital lobe, small branches to midbrain, thalamus, hypothalamus and geniculate bodies
Branches of internal carotid artery?
Ophthalmic, posterior communicating artery, anterior choroidal artery, anterior cerebral artery, middle cerebral artery.
What does the posterior communicating artery connect?
ICA and posterior cerebral artery
What does the anterior choroidal artery supply?
Choroid plexus of the lateral ventricle, optic tract, internal capsule
What junctions are found between the epithelia cells forming the blood Brian barrier?
Tight junction
What is the function of the astrocytes on the blood brain barrier?
Gather nutrients coming through and provide the brain with them
What is the function of the circle of Willis?
Allows each side of brain to have separate blood supply - protection
What are the ventricles made of?
Neural tube
What do the ventricles contain?
CSF
What cells make CSF?
Choroid plexus or ependymal cells
What is the function of CSF?
Allows brain to float - protective cushioning
Removes waste metabolites
Provides stable ionic environment for CNS
How are the lateral and 3rd ventricles joined?
Interventricular foramen
What is the cerebral aqueduct?
Connects 3rd ventricle to 4th ventricle
How does CSF move through ventricles?
Pressure change
What ventricle is CSF mainly made in?
Lateral
