Ischemic CVA Syndromes cont. - Lecture 11 Flashcards
internal carotid syndrome can be dt
hypoperfusion
embolus
thrombus
what is ICA syndrome preceded by
history of TIAs
amaurosis fugax
transient monocular blindness
frequent accompanying symptom
amaurosis fugax includes
temp fading of vision or blindness
d/t decrease blood supply from the ICA to the opthalmic artery
ICA supplies
MCA and ACA
complete blockage of ICA without collateral circulation
deficits in both MCA and ACA
what is possible w/ ICA syndrome
uncal herniation
coma
death
significant edema
PCA supplies
occipital lobe
medial/inferior temporal lobe
upper brainstem
midbrain
posterior diencephalon
thalamus
2 branches of PCA
central
peripheral
central
thalamic pain syndrome
hemiballismus
contralateral hemiplegia
thalamic pain syndrome
typified by 1 month recovery from hemisensory loss followed by brutal, intractable pain
thalamic pain syndrome is infarct of
ventral posterolateral nucleus of thalamus
hemiballismus
subthalamic nuclei infarct
contralateral hemiplegia
from cerebral peduncle involvement
peripheral PCA
transient global amnesia
dyslexia w/o agraphia
visual symptoms
transient global amnesia
hippocampal lesion in the temporal lobe
dyslexia w/o agraphia
color naming and discrimination problems
dyslexia w/o agraphia lesion
dominant calcarine lesion and posterior corpus callosum lesion
visual symptoms lesion
occipital lobe
visual symptoms
visual agnosia
cortical blindness
contralateral homonymous hemianopsia
prosopagnosia
topographic disorientation
vertebral artery
primary supply to medulla and posterior inferior cerebellum
vertebral artery is most often occluded by
atherosclerosis
susceptible to trauma
-MVA
-inappropriate extension/rotation
vertebral artery syndrome
wallenberg’s (lateral medullary) syndrome
wallenberg’s (lateral medullary) syndrome
all ipsilateral besides contralateral loss of pain and temp
horner’s syndrome
horner’s syndrome
miosis
ptosis
anhidrosis
basilar artery supplies
pons
superior cerebellar peduncles
portions of the midbrain
cerebellum
diencephalon
lesion to basilar artery is
life threatening
why can a lesion be catastrophic
pontine damage
-coma
-locked in
-akinetic mutism
-tetraplegia
basilar artery syndrome has a
poor prognosis
cerebellum is supplied bu
3 arteries
3 arteries that supply the cerebellum
SCA and AICA (from basilar artery)
PICA (from vertebral artery)
cerebellum lesion symptoms
dizziness
nausea/vomiting
ipsilateral ataxia
direction-changing nystagmus
nystagmus
rapid, involuntary rhythmic eye movement with the eyes moving quickly in one direction (quick phase) and then slowly in another (Slow phase)
how is a nystagmus defined
the direction of the quick phase
