Blood supply of brain Flashcards
At what lvl does the vertebral arterys join to form the basilar artery
at lvl of pontomedullary groove
what does the basilar artery branch into
post cerebral arteries
What does the internal corotid artery branch into and where is the branching at
enters carotid channel into mid cranial fossa and ends in sub arachnoid space lat to optic chiasma
@ this lvl it branches to middle and ant cerebral artery
What is path and structures supplied by middle cerebral artery
gives deep arteries (leticulostriate) to putamin, cunate nuc, genu
Supplies most of lat hemisphere (primary motor cortex, premotor, brocas, somatosensory, wernikes, auditory)
What is path and structured supplied by ant cerebral artery
Runs above optic n which gives off ant communicating artery
- Gives off deep branch (hubener) to head of caudate, ant putamin, ant limb
- Gives off superficial branch to supply primary somatomotor cotex for lower limb
What does the circle of wilis consist of
ICA Ant cerebral arteries Ant communicating arteries Post cerebral arteries Post communicating arteries
If stroke or pathology occurs in ant communicating branch what could it compress and lead to
Located just above optic chiasm
Could result in visual field defects
what is the flow of venous blood
From ant to post
Sup cerebral vein drainage
sup saggital sinus
Sup middle cerebral vein draiage
cavernous sinus
Deep middle cerebral and ant cerebral vein draiange
Basal vein
what do veins from medial surface drain into
Superior sagittal sinus and smaller veins will drain to inf sagittal sinus
where does basal vein drain
Into great cerebral vein
What is the great cerebral vein made of and where does it drain
formed by int cerebral vein and basal vein, drains thru straight sinus to confluence of sinus along with sup sagittal sinus
What sinuses drain into confluence of sinuses
Sup sagittal sinus
Straigh sinus
Where does the transverse sinus drain
sigmoid sinus
Where does the sigmoid sinus drain into
Int jugular vein
What structures are located in cavernousus sinus
ICA (+sympathetic nerve plexus traveling w it)
CNs 3,4,5 (v1,V2)
Sup opthalmic veins
Stroke affecting deep branches of middle cerebral art
deficits in CL upper limb, trunk, lower limb, face/tongue (motor + sensory)
-Visual field defects
Stroke affecting cortical branches of middle cerebral
Depends on what area it affects
ex are 4- CL hemiplegia of lower face/tongue, upper limb/trunk
Stroke affecting ANt spinal artery
(middle medulalry syndrome)
Cl hemiplegia og body, deviation of tongue on same side
loss of vibration, fine touch LC (medial lemniscus)
Stroke affecting PICA
(lat medullary syndrome)
Lat lemniscus affected vertigo CL loss of pain temp uvula towards healthy side loss of taste horners
Stroke affetcing Post spinal artery
Branch of PICA
Ataxia on IL side
Stroke affecting basilar
locked in syndrome
