Blood Supply to the Brain Flashcards
What arteries do the left and right vertebral arteries arise from?
Subclavian arteries
What arteries do the left and right internal carotid arteries arise from?
Common carotid arteries
How is the basilar artery formed?
When 2 vertebral arteries join at the base of the skull
How does the posterior communicating artery complete the posterior of the circle of the willis?
By linking the ICA to the posterior cerebral arteries
How does the anterior communicating artery complete the anterior of the CoW?
Linking the anterior cerebral arteries
Where does the anterior cerebral artery lie?
The median longitudinal fissure
Where does the middle cerebral artery lie?
The lateral sulcus
Where does the posterior cerebral artery lie?
Calcarine sulcus
What does the vertebra-basilar system supply?
Brainstem
Occipital lobes
Cerebellum
Inferior medial aspect of temporal lobe
What does the posterior cerebellar artery run immediately superior to?
Vertebro-Basilar system
Where does the oculomotor nerves emerge from?
Just above the superior cerebellar artery
What does the carotid sinus monitor?
Flow of blood to the head including the brain
Sensory nerves of the carotid sinus run in what?
Glossopharyngeal Nerve
Vagus Nerve
What does the carotid body contain?
Chemoreceptors which are sensitive to low oxygen levels
What does detection of low oxygen levels increase?
Heart Rate
Respiratory Rate
Blood pressure
