vascular brainstem syndrome

Question 1

the vertebral arterires supply the

Answer 1

brainstem and portions of diencephalon.

Question 2

from the ventral view the vertebral arteries travel

Answer 2

within the subarachnoid space, paralleling the pyramids of the medulla.

Question 3

each vertebral artery emit

Answer 3

a posterior spinal artery

Question 4

posterior spinal artery travels

Answer 4

dorsally to supply the dorsal columns of the medulla before decending to exit the skull and supply the dorsal spinal cord.

Question 5

vertebral arteries emit second

Answer 5

the anterior spinal arteries

Question 6

the anterior spinal arteries unify

Answer 6

along the midline before exiting the skull to supply the ventral spinal cord.

Question 7

verterbral arteries emit third

Answer 7

the posterior inferior cerebellar arteries

Question 8

the posterior inferior cerebellar travel

Answer 8

laterally then dorsally to enter the fourth ventricle and forament of magendie and also supply the inferior cerebellar peduncle and the posterior and inferior cerebellar hemispheres

Question 9

posterior inferior cerebellar can also be the source of

Answer 9

the posterior spinal artery

Question 10

the verterbral arteries unify near

Answer 10

the juntion of the medulla and pons.

Question 11

anterior inferior cerebellar artery arises from basilar near

Answer 11

the roots of craniel nerve VI and travel laterally along the pontomedullary junction reaching the cerebello pontine angle in route to the foramina of luscka and lateral fourth ventricle, middle cerebellar peduncles and anterior and inferior portions of the cerebellar hemisphere.

Question 12

either the basilar or the anteiror inferior cerebellar artery will emit

Answer 12

a labryinthe artery that travels laterally to follow cranial nerves VII and VIII to inner ear.

Question 13

basialr supplies the

Answer 13

pons and cerebellar peduncles

Question 14

at the junction of the pons and midbrain the basialr artery emits

Answer 14

the superior cerebellar arteries

Question 15

the superior cerebellar arteries supply the

Answer 15

superior cerebellar peduncles the caudal mid brain and the superior vermis and hemispheres of the cerebellum

Question 16

the posterior cerebral artery arises

Answer 16

just rostral to cranil nerve II

Question 17

posterior cerebral artery travels

Answer 17

laterally and dorsally

Question 18

posterior cerebral artery supplies the

Answer 18

midbrain, third and lateral ventricles, the thalamus and epithalamus.

Question 19

Medial medullary syndrome

Answer 19

anterior spinal artery –Contralateral paresis:pyramid –contralateral somatosensory loss(DCML):medial leminiscus –ipsilateral weakness of the hypoglossal nerve

Question 20

Lateral meduallry syndrome

Answer 20

Posterior inferior cerebellar artery –ipsilateral facial anesthesia/thermanesthesia:spinal nucleus and tract of trigeminal nerve –contralateral anteshtesia/thermanesthesia:ALS –vertico and ocular disturbances:vestibular nuclei –Dysphagia/Dysarthria: efferents of the nucleus ambiguus –ipsilateral ataxia: inferior cerebellar peduncle –ipsilateral horner syndrome

Question 21

Pons-Locked in syndrome

Answer 21

bilateral involvement of the ventromedial basilar branches –bilateral paralysis often awith preservation of vertical movements of the eyes and opening of the eyelids: inframesencephalic corticospinal and corticobulbar fibers plus cranil nerve VI(sensory may be spared

Question 22

Midbrain-Weber syndrome arteries

Answer 22

paramedian branches of basilar bifurcation, proximal branches of the psoterior cereberal arteris, short circumferential branches of the posteror medial choroidal and quadrigeminal arteries.

Question 23

Weber syndrome symptoms

Answer 23

Contralateral paresis often greater in upper body: cotrical spinal fibers –ipsilateral deviaton of the eyes:corticobulbar fibers –contralateral lower facial paresis: corticobulbar fibers –contralateral lingaual paresis: corticobulbar fibers –ipsilateral opthalmoplegia: CN III

Question 24

Claude syndrome artery

Answer 24

paramedian branches of the basilary pifurcation, proximal branches of the posterior cerebral arteries, short circumferential branches of the posterior medial choroidal and quadrigeminal arteris

Question 25

Claude syndrome symptoms

Answer 25

–ipsilateral opthalmoplegia: CN III – contralateral postrual instability: red nucleus