week 10

Question 1

what are the 2 arterial systems?

Answer 1

anterior circulation-carotid circulation
posterior circulation-vertebral/basilar circulation

Question 2

How are cerebral hemispheres supplied w blood?

Answer 2

anterior and posterior systems

Question 3

how is the brainstem supplied?

Answer 3

posterior system only

Question 4

how is the spinal cord supplied?

Answer 4

systemic circulation and vertebral arteries

Question 5

what is caudal medulla supplied by?

Answer 5

medial regions-spinal arteries
lateral regions-vertebral arteries

Question 6

what is rostral medulla supplied by?

Answer 6

medial regions-vertebral arteries
lateral regions-branch off vertebral artery-PICA

Question 7

what is located at pons-medullary junction?

Answer 7

vertebral arteries join to form basilar artery

Question 8

what are the three branches of basilar artery?

Answer 8

paramedian branch-midline pons
short circumferential branches-lateral pons
long circumferential branches-dorsolateral pons

Question 9

what supplies rostral midbrain

Answer 9

posterior cerebral arteries

Question 10

what supplies caudal midbrain?

Answer 10

basilar artery

Question 11

tegmentum/tectum

Answer 11

proximal branches of each artery (posterior cerebral arteries, basilar arteries) supply base/tegmentum. Tectum is supplied by posterior cerebral arterys more distal branches.

Question 12

cerebral cortex

Answer 12

supplied by distal branches or anterior, middle, posterior cerebral arteries

Question 13

anterior cerebral artery

Answer 13

dorsal and medial portion of frontal and parietal lobes

Question 14

middle cerebral artery

Answer 14

lateral convexity of cortex-parietal, temporal, occipital, internal capsule striatum of basal ganglia

Question 15

posterior cerebral artery

Answer 15

occipital lobe and portions of medial/inferior temporal lobes

Question 16

venous drainage

Answer 16

superficial and deep territories
superficial drain into superior sagittal sinus and cavernous sinus
deep veins into the great vein of Galen
all venous drainage reaches internal jugular vein
venous sinuses lie enclosed within folds of the two layers of dura