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
