vertebral arteries (R and L)
ascend through the transverse foramina of the cervical vertebra and enter the cranial cavity via the foramen magnum.
internal carotid arteries
ascend through the neck to the base of the skull and enter the cranial cavity through the carotid canal.
The vertebral arteries contribute to the -------
The vertebral arteries contribute to the posterior circulation
, ascend through the transverse foramina of the cervical vertebra and enter the cranial cavity via the foramen magnum.
the right and left vertebral arteries unite to form the basilar artery.
The anterior and posterior spinal arteries
arise from the vertebral arteries
supply the spinal cord
anterior and posterior spinal arteries
travel midline spinal cord (
Anterior Spinal Artery
travel just posterior to the dorsal horn of the spinal cord (bilateral)
Posterior Spinal Arteries
spinal arteries braches from the vertebral artery provide
sufficient blood supply to the upper cervical spinal cord levels only.
one anterior and two posterior spinal arteries extend -----to supply the spinal cord
one anterior and two posterior spinal arteries extend caudally to supply the spinal cord
reinforce anterior and posterior spinal arteries
branches off of the posterior intercostal arteries.
radicular artery at ~T12 spinal cord level
called the great radicular artery
may provide the entire arterial supply for the lumbosacral spinal cord.
vertigo and ipsilateral deafness
occlusion of internal auditory or labyrinthine artery
basilar artery terminates by bifurcating
into the two posterior cerebral arteries
which of the following isnt a branch of the basilar art
Anterior inferior cerebellar artery
Superior cerebellar artery
internal auditory or labyrinthine artery
Posterior inferior cerebellar artery
t Posterior inferior cerebellar artery
anterior spinal artery, vertebral artery, PICA supply
posterior spinal artery
Caudal medulla :
pons is mainly supplied by branches of the -----
pons is mainly supplied by branches of the basilar artery
anterior inferior cerebellar artery and
rostral pontine levels
basilar artery and superior cerebellar artery
Most of the midbrain is supplied by the ------ ----- ---- and their branches
Most of the midbrain is supplied by the posterior cerebral arteries and their branches
Blood supply to the most dorsal aspect of the midbrain arises from the ------- ------- -------
Blood supply to the most dorsal aspect of the midbrain arises from the superior cerebellar artery.
Supplies the occipital lobe and medial and inferior surface of the temporal lobe
Posterior cerebral artery (PCA) territory
lesion to post column
vibration and position sense
lesion to anterolateral pathways
pain and temp sense
ischemia in the territory of the vertebral artery and/or PICA.
lateral medullary syndrome
Wallenberg’ s Syndrome
spinal trigeminal nucleus and tract of wallensurg syndrome
contralat body dec. pain and temp sense
Spinothalamic tract of wallenburg syndrome
contralat body dec pain and temp sense
hoarsenss and dysphagia
nucleus ambiguous of wallenburg syndrome
ipsilateral dec taste
nucleus solitary of Wallenburg syndrome
descending symp. fibers of wallenburg syndrome
ipsilateral horners syndrome
inf cerebral peduncle, vestibular nuceli
ips ataxia, vertigo, nausea, nystagmus
bilateral ventral pons ischemia
narrowing of basilar artery
he/she is only capable of eye movements.
pontomesencephalic reticular formation
spared in Locked-in Syndrome
consciousness is spared.
only capable of eye movements
by bilateral ventral midbrain ischemia (cerebral peduncles)
secondary to lack of blood flow in the rostral basilar artery
The “Circle of Willis” connects the ----- and -----
arterial cerebral circulation
The “Circle of Willis” connects the anterior and posterior arterial cerebral circulation
©Both ICAs terminate by giving rise to
a middle cerebral artery (MCA) and anterior cerebral artery (ACA).