CNS part 5 Flashcards
common carotids divide to form
the internal and external carotids at the carotid sinus
what does the carotid sinus contain
baroreceptors and chemoreceptors
what does the external carotids supply
neck and outside of skull
external carotids form
lingual artery
facial artery
occipital artery
superficial temporal artery
what enters the skull to deliver blood to the brain
internal carotids
what do the internal carotids branch to form
ophthalmic artery
anterior cerebral artery
middle cerebral artery
what supplies the midbrain and lateral surfaces of the cerebrum
middle cerebral artery
left and right vertebral arteries fuse to form the
basilar artery
where does the basilar artery branch
area of the pons
what connects the basilar artery and internal carotid arteries
posterior cerebral and posterior communicating arteries
ring like anastomosis is called the
CEREBRAL ARTERIAL CIRLE- circle of wallis
what connects the R and L anterior cerebral arteries
anterior communicating artery
basilar artery splits into the
R and L posterior cerebral arteries
posterior communicating arteries connect the
posterior cerebral arteries with the middle cerebral arteries
the circle of willis is a
safety mechanism
3 main arteries supply the cerebellum
superior cerebellar
anterior inferior cerebellar
posterior inferior cerebellar
how long does it take to have permanent neuronal damage
4 minutes
vertebral to
basilar to posterior cerebral arteries to posterior communicating arteries
middle cerebral artery (MCA) found in
frontal, parietal, and temporal lobes
anterior cerebral artery (ACA) found in
inferior frontal lobe + medial surface of frontal and parietal lobes
what is responsible for blood supply for upper extremity of motor and somatosensory cortices
MCA
what is responsible for blood supply to lower extremities of somatosensory and motor cortices
ACA
what is the posterior cerebral artery (PCA) responsible for
inferior and medial temporal and occipital lobes + thalamus
cerebral perfusion pressure (CPP) is
pressure the blood is delivered to the brain at the capillary level
intracranial pressure is
pressure inside the skull due to bran tissues and fluid
CPP =
MAP - ICP
ICP may be high in
traumatic brain injury
what is more important than maintaining CPP
maintaining CBF
keeping delivery of glucose and O2 to brain sufficient
