Neuro 10: Brain hemisphere circulation Flashcards
(47 cards)
Cerebral hemisphere anterior circulation comes from
Internal carotid
Cerebral hemisphere posterior circulation comes from
Vertebral arteries
Terminal branches of internal carotids
anterior cerebral arteries (ACAs)
middle cerebral arteries (MCAs)
Putamen circulation source
ACA
Caudate nucleus circulation source
MCA
Thalmus circulation source
PCA
Superior left MCA infarct signs
Upper motor neuron right face and arm weakness
Broca’s aphasia (has trouble getting words out)
Inferior Left MCA infarct
Wernicke’s aphasia (forms sentences that makes no sense). Right visual field defect. Usually no motor findings
Deep Left MCA infarct
Right upper motor neuron hemiparesis
Left MCA Stem infarct
Right hemiplegia, right hemiamnesthesia, aphasia,
left gaze preference
Right superior MCA infarct
Left face/arm weakness, left hemineglect
Inferior Right MCA infarct
Profound left hemineglect.
Left visual field and somatosensory deficits
Deep right MCA infarct
Left motor hemiparesis
Right MCA stem infarct
Left hemiplegia, hemianesthesia, left hemineglect.
Right gaze preference.
Left ACA infarct
Right leg UMN weakness. Right leg cortical sensory loss.
Grasp reflex maybe
Right ACA infarct
Left leg UMN weakness. Left leg cortical sensory loss.
Grasp reflex maybe
Left PCA infarct
Right homonymous hemianopia
Right PCA infarct
Left homonumous hemianopia
Gaze preference side
“looks towards lesion”
ACA infarcts affect…
Contralateral leg more than arm or face
Watershed infarct
Area between two arteries is most affected
Man in barrel syndrome
Proximal arm and leg weakness as a result of watershed infarct of ACA and MCA
Carotid stenosis causes _________
Watershed infarct of ACA-MCA
TIA duration
Typically 10 min