Brainstem Stoke Flashcards
Level of CN III:
rostral midbrain
Level of CN IV:
caudal midbrain
Level of CN V:
rostral pons
Level of CN VI:
caudal pons
Level of CN VII:
caudal pons
Level of CN VIII:
caudal pons and rostral medulla
Level of CN IX:
rostral medulla
Level of CN X:
rostral medulla
Level of CN XI:
rostral medulla
Level of CN XII:
rostral medulla
Tongue deviation and dysphagia are symptoms associated with which broad level?
medulla
Lateral gaze and facial palsy are associated with which broad level?
pons
Loss of pupillary relax is associated with which broad level?
midbrain
Which arteries supply the Midbrain?
PCA, SCA, basilar
Which Arteries supply the pons?
Basilar, AICA
Which arteries supply the Medulla?
vertebral, PICA
Which arteries supply the cerebellum?
PICA, AICA, SCA
What parts of the brain does the vertebral artery supply?
The medulla
What parts of the brain does the PICA supply?
Cb, medulla
What parts of the brain does the AICA supply?
Cb, Pons
What parts of the brain does the Basilar artery supply?
Pons and Midbrain
What parts of the brain does the SCA supply?
Cb, midbrain
What parts of the brain does the PCA supply?
Midbrain
What is another name for Lateral Medullary Syndrome?
Wallenberg’s syndrome
What is Wallenberg’s syndrome?
Stroke involving dorsolateral area of the upper medulla
What areas are involved in Wallenberg’s syndrome?
Inferior Cb peduncles Vestibular nuclei Fibers of CN IX and X Spinal nucleus/tract of V spinothalamic tract sympathetic pathways
What does Medial Medullary syndrome involve?
Pyramid
medial lemniscus
CN XII
Signs of Medial Medullary Syndrome?
Contralateral body weakness
Loss of contralateral discriminative touch/conscious proprioception
Ipsilateral tongue weakness
diminished gag reflex
What is locked in syndrome?
Bilateral ventral brainstem strokes of pons and perhaps medulla
Why is there no voluntary body movement?
Bilateral cortico-spinal involvement
What does pontocerebellar Angle Syndrome involve?
CN VIII
Cerebellum
CN VII
What does pontocerebellar Angle syndrome result in?
Ipsilateral vertigo, dizziness, tinnitus
Ipsilateral CB signs
Ipsilateral Facial paralysis
What usually causes pontocerebellar angle syndrome?
Tumor of CN VIII aacoustic schwanoma
What do Basal Pontine syndromes result in?
Contralateral Hemiplegia
ipsilateral internal strabismus, facial paralysis or loss of facial sensation
contralateral loss of discriminative touch and proprioception
What areas are affected with Basal Pontine Syndromes?
corticospinal fibers in basilar pons
cranial nerve in the area (abducens, facial and/or trigeminal)
may involve medial lemniscus
What does Weber’s syndrome involve?
CN III
portions of the crus cerebri
What does Webers syndrome result in?
Esternal strabismus, ptosis, pupillary dialation
contra lateral hemiplegia and paralysis of the contra lateral lower face lower
