Ischemic CVA Syndromes- Lecture 11 Flashcards
how are the primary motor and sensory areas arranged
somatotopically
cortical homunculus
different parts of the body are represented by different portions of the brain
what is the cortical area devoted to each body part proportional to
motor innervations received by the corresponding body parts
ischemic syndromes
MCA
ACA
PCA
IC
vertebral
basilar
cerebellar
MCA
upper and lower division
is MCA embolic or thrombic
embolic more often
MCA is most often
occluded artery as a result of vascular dz
MCA is the
largest terminal branch of the IC
what does the MCA supply
lateral cerebral hemisphere
posterior internal capsule
corona radiata
globus pallidus
caudate
putamen
MCA occlusion results in
contralateral spastic hemiparesis
contralateral hemianesthesia
contralateral homonymous hemianopsia w/ impairment of conjugate gaze in the direction opposite the lesion
homonymous hemianopsia
loss of the temporal visual field form one eye and the nasal visual field of the other eye
R occipital lobe damage
loss of L visual field
L temporal and R nasal
L occipital lobe damage
loss of R visual field
R temporal and L nasal
MCA occlusion –> L hemisphere is involved
dominant
global aphasia
MCA occlusion –> R hemisphere involved
non-dominant
perceptual deficits
perceptual deficits
anosognosia
unilateral neglect
spatial disorganization
upper division MCA involvement of dominant hemisphere
broca’s aphasia with hemiparesis of face and UE more than LE
broca’s aphasia
frontal lobe damage
other names for broca’s aphasia
expressive
oromotor
non-fluent
broca’s aphasia is
lesion to the frontal lobe of the L hemisphere
what does broca’s aphasia cuase
awkward articulations
restricted vocab
restriction to simple grammatical forms
brocas aphasia comprehension
in tact
brocas aphasia writing
skills mirror pattern of speech
brocas aphasia reading
less impaired than speech and writing
lower division MCA occlusion on the dominant side
auditory association cortex of lateral temporal lobe
lower division MCA occlusion causes
Wernicke’s aphasia
other names for Wernicke’s aphasia
receptive
sensory
fluent
Wernicke’s aphasia includes
loss of auditory comprehension
loss of command following
loss of ability to read and write
distortion of articulate speech
Wernicke’s aphasia hearing
intact
Wernicke’s aphasia speech
fluent with a natural language rhythm
but lack content or meaning
uses neologisms and paraphasias
global aphasia
severe aphasia of both production and comprehension
global aphasia includes
poor reading and auditory comprehension, repetition, naming and writing
global aphasia speech
non fluent
what is global aphasia indicative of
extensive brain involvement
can be bilateral
global aphasia prognosis
poor
conduction aphasia
results from interruption in connections b/w Broca’s and Wernicke’s area
conduction aphasia presents like
Wernicke’s aphasia
but with good comprehension and understands commands
conduction aphasia has
poor repetition, naming and writing
ACA supplies
frontal and parietal lobes
BG
anterior fornix
anterior 4/5 of corpus callosum
ACA syndrome is
fairly rare
frequently asymptomatic d/t collateral circulation
what does ACA syndrome occur d/t
embolism more than thrombus
if dominant language hemisphere is affected (ACA)
abulia and a reduction in the rate or complexity of language and speech
abulia
abnormal lack of ability to act or to make decisions
severe form of abulia
akinetic mutism
ACA affects
LE > UE
by paresis and sensory loss
ACA has
memory and behavioral impairments
non-dominant side damage ACA
unilateral neglect
