Blood supply of brain

Question 1

At what lvl does the vertebral arterys join to form the basilar artery

Answer 1

at lvl of pontomedullary groove

Question 2

what does the basilar artery branch into

Answer 2

post cerebral arteries

Question 3

What does the internal corotid artery branch into and where is the branching at

Answer 3

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

Question 4

What is path and structures supplied by middle cerebral artery

Answer 4

gives deep arteries (leticulostriate) to putamin, cunate nuc, genu

Supplies most of lat hemisphere (primary motor cortex, premotor, brocas, somatosensory, wernikes, auditory)

Question 5

What is path and structured supplied by ant cerebral artery

Answer 5

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

Question 6

What does the circle of wilis consist of

Answer 6

ICA
Ant cerebral arteries 
Ant communicating arteries
Post cerebral arteries
Post communicating arteries

Question 7

If stroke or pathology occurs in ant communicating branch what could it compress and lead to

Answer 7

Located just above optic chiasm

Could result in visual field defects

Question 8

what is the flow of venous blood

Answer 8

From ant to post

Question 9

Sup cerebral vein drainage

Answer 9

sup saggital sinus

Question 10

Sup middle cerebral vein draiage

Answer 10

cavernous sinus

Question 11

Deep middle cerebral and ant cerebral vein draiange

Answer 11

Basal vein

Question 12

what do veins from medial surface drain into

Answer 12

Superior sagittal sinus and smaller veins will drain to inf sagittal sinus

Question 13

where does basal vein drain

Answer 13

Into great cerebral vein

Question 14

What is the great cerebral vein made of and where does it drain

Answer 14

formed by int cerebral vein and basal vein, drains thru straight sinus to confluence of sinus along with sup sagittal sinus

Question 15

What sinuses drain into confluence of sinuses

Answer 15

Sup sagittal sinus

Straigh sinus

Question 16

Where does the transverse sinus drain

Answer 16

sigmoid sinus

Question 17

Where does the sigmoid sinus drain into

Answer 17

Int jugular vein

Question 18

What structures are located in cavernousus sinus

Answer 18

ICA (+sympathetic nerve plexus traveling w it)
CNs 3,4,5 (v1,V2)
Sup opthalmic veins

Question 19

Stroke affecting deep branches of middle cerebral art

Answer 19

deficits in CL upper limb, trunk, lower limb, face/tongue (motor + sensory)
-Visual field defects

Question 20

Stroke affecting cortical branches of middle cerebral

Answer 20

Depends on what area it affects

ex are 4- CL hemiplegia of lower face/tongue, upper limb/trunk

Question 21

Stroke affecting ANt spinal artery

Answer 21

(middle medulalry syndrome)

Cl hemiplegia og body, deviation of tongue on same side
loss of vibration, fine touch LC (medial lemniscus)

Question 22

Stroke affecting PICA

Answer 22

(lat medullary syndrome)

Lat lemniscus affected
vertigo
CL loss of pain temp
uvula towards healthy side
loss of taste
horners

Question 23

Stroke affetcing Post spinal artery

Answer 23

Branch of PICA

Ataxia on IL side

Question 24

Stroke affecting basilar

Answer 24

locked in syndrome

Question 25

Stroke affecting labrynth

Answer 25

Branch of AICA
Impair inner ear
unable to maintain upright

Question 26

Stroke affecting pontine

Answer 26

Cl loss of voluntary motor control

Question 27

Stroke affecting prox and terminal PCA

Answer 27

Prox - webers syndrome if circle of wilis isnt working

Terminal- Visual field defects