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Gross anatomy test #3 > cranial circulation > Flashcards

Flashcards in cranial circulation Deck (43)
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1

where are optic chiasmas located?

in the stalk of the pituitary

2

where is the Circle of Willis?

bottom of the brain in the middle

3

can the brain burn fats for energy?

no. it can only burn glucose for energy

4

if oxygen supply to the brain is cut off how long will it take for the brain tissue to start to fall apart?

4 minutes

5

if the oxygen supply is cut off to the hippocampus how long will it take to fall apart?

3 minutes

6

what is ischemia?

loss of oxygen

7

what is an ishcemia infarct?

necrosis (death of tissue) due to loss of oxygen. the brain tissue and hippocampus have critical time periods of failure if oxygen isn't supplied.

8

what carries blood to the anterior section of the brain?

internal carotid artery

9

what carries blood to the posterior section of the brain?

vertebral arteries

10

if hypoxic conditions persist in the brain, how long would it take to become unconscious?

20-30 seconds

11

what is Dissection of arteries

delamination of arteries which would lead to formation of clots, this happens either traumaticaly or spontaneously.

12

if circulation in an artery ceases, which are the first neurons to die?

the neurons that are furthest from the artery

13

what does the anterior carotid artery split into?

the external and internal carotid artery

14

if oxygen is cut off to the brain which regions will be damaged the most?

the regions that are most used because they are the most demanding

15

what does an MRI detect?

soft tissue damage in the brain

16

what will a vertebral stroke lead too?

loss of vision

17

what arteries are branches of the internal carotid artery?

anterior cerebral and middle cerebral arteries.

18

which arteries are important for posterior circulation?

Vertebral arteries
Basilar artery
Posterior cerebral arteries
Cerebellar arteries

19

right side of the brain is known for?

spatial recognition

20

left side of the brain is known for?

languages

21

what is the most common place to get a stroke?

lenticulostriate arteries

22

what is unique about lenticulostriate arteries?

you are going from a big artery to a small artery so its easy for a clot to get in there

23

how long does it take to know the full extent of a stroke

3 months

24

what is a hemorraghic stroke?

Cerebral blood vessel rupture

25

aneurism

a bubble

26

Circle of Willis hemorrhage

is leaking in the subarachnoid space

27

what increases risk of hemorraghic stroke?

Anticoagulants increase risk
HTN (high blood pressure) increases risk

28

Occlusive Stroke

Blockage in cerebral arteries

29

emboli

different types of blockage: clots, fat, air (ischemia)

30

Transischemic attack (TIA)

temporary stroke (lose vision and it comes back)