blood supply to head Flashcards
what cardiac output, O2, glucose goes to brain?
Receives 15% of cardiac output and uses 20% of total body O2 and 25% of total body glucose
WHAT IS the difference between brain veins and normal veins
no valves
basilar artery becomes
PCA
midd meningeal comes off
maxillary artery
maxillary artery comes off
external carotid
pterion which bones
frontal temporal parietal sphenoid
vertebral artery comes off
subclavian
pica comes off
vertebral
aica comes off
basilar
dural sinuses lie
between 2 layers of dura mater
what is this part of the brainstem? lable the blood supply
what is this part of the brainstem? lable the blood supply
what is this part of the brainstem? lable the blood supply
head sinuses drain into
IJV
1 year mortality haemorrhagic stroke
60%
MCA stroke functional deficits
Dominant hemisphere (left)
Global aphasia
Sensorimotor loss on contralateral face, upper limb and trunk
Non-dominant hemisphere (right)
Neglect syndrome
ACA stroke functional deficits
Contralateral sensorimotor loss below waist
Urinary incontinence
Personality defects
Split-brain syndrome
subdural haemotoma which vessels
bridging veins
what sort of bleed is epidural haemoatoma
arterial (v quick)
PCA stroke functional deficits
Contralateral homonymous hemianopsia
Reading and writing deficits
Impaired memory
often first sign of TIA
amaurosis fugax
how do recorgnise subarachnoid bleed on CT
bleed goes everywhere
where does expansion of epidural haematoma stop
suture lines
symptoms of subarachnoid haematoma onset
Severe headache (thunderclap)
Vomiting
Confusion
Lowered / fluctuating levels of consciousness
ECG subarachnoid haemorrhage
looks like STEMI
what happens to CSF in subarachnoid haematoma
xanthochromia - goes yellow because of bilirubin
most common cause of subarachnoid hameorrage
ruptured berry aneurysms
which sort of brain bleed often has a lucid period before rapid deterioration
epidural
