a problem with which blood vessel results in frontal lobe dyfunction
anterior cerebral
what would the patient experience if there was a CVA in the anterior cerebral artery
contralateral sensory loss in foot and leg
paresis of arm and food
thigh and face relatively spared
what would result if the blood supply from the middle cerebral artety was compromised
hemipareis
hemisensory loss
aphasia/dysphasia
apraxia
what parts of the brain are supplied by the vertebrobasilar part of the brains vasculature
brain stem
cerebellum
occipital lobe
what is webers syndrome
stroke characterised by :
ipsilateral oculomotor nerve palsy and contralateral hemiparesis or hemiplegia
disruption to the blood supply of what area of the brain stem cause webers
midbrain
A stroke in which area can cause a medial or lateral inferior pontine syndrome
pons
what kind of syndrome results from a stroke n the medulla
lateral medullary syndrome
what kind of visual loss is seen if the occiptal lobe is damaged
hoomonymous hemianopia with macular sparing
what kind of symptoms are seen in cerebellar problems
ataxia
nystagmous
intention tremor
pendular reflexes
What is the definition of a ‘stroke’
sudden disturbance of cerebral function of vascular origin that causes death or lasts over 24 hours
at what systolic blood pressure are autoregulatory mechanisoms unable to compensate for the reduction in blood flow
50mmHg
which cells in the brain are more vunerable to ischaemia
neurons (more than glial cells)
some neurons more vunerable than others
give examples of groups of neurons which are more vunerable
pyramidal cells of hippocampus
purkinje cells
neurons in globus pallidus of basal ganglia
which type of stroke is more common
infarction (appoz 84 percent)
what causes cerebral infarction
local interuption of cerebral blood flow due to thrombosis or emboli
what is the most common cause of a spontaneous subarachnoid haemorrhage
berry anneurysm (rupture of saccular anneurysm)
what are the clinical features of a subarachnoid haemorrhage
severe headache (thunderclap)
vomiting
loss of consciousness
neck rigidity seen sometimes
