Brainstem Vascular Syndromes

Question 1

Arterial supply of midbrain (2)

Answer 1

tip of basilar a.

branches of Posterior communicating a.

Question 2

Structures involved at midbrain (base) and symptoms

Answer 2

CN III fascicles
cerebral peduncle

ipsilateral 3rd nerve paresis
contral. hemiparesis

Question 3

structures involved at midbrain (tegmentum) and symptoms

Answer 3

CN III fascicles
red nucleus
superior cerebellar peduncle

ipsilateral 3rd nerve paresis

contral. tremor
contral. ataxia

Question 4

structures involved at midbrain (base and tegmentum) and symptoms

Answer 4

CN III fascicles
red nucleus
superior cerebelar peduncle
substantia nigra

ipsilateral 3rd nerve paresis

contral. hemiparesis
contral. tremor
contral. ataxia

Question 5

Arterial supply of pons

Answer 5

Paramedian branches of basilar artery

Question 6

structures involved in medial pons

Answer 6

Corticospinal and corticobulbar tracts
CN VII fascicles
PPRF and/or CN VI

Question 7

symptoms of arterial blockage in pons

Answer 7

Contral hemiparesis
ipsilateral LMN facial paresis
Ipsilateral gaze paresis

Question 8

Arterial supply of medial medulla

Answer 8

vertebral artery

paramedial branches

Question 9

Arterial supply of lateral medulla

Answer 9

vertebral artery or posterior inferior cerebellar artery

Question 10

Structures in medial medulla

Answer 10

corticospinal tract
medial lemniscus
CN XII

Question 11

Structures in lateral medull

Answer 11

vest. nuclei
inf. cerebellar peduncle
CN V and tract
Spinothalamic tract
sympathetic fibers
nucleus ambiguus
nucleus solitarius