2 Blood Supply and Ventricular Supply - B Flashcards Preview

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Flashcards in 2 Blood Supply and Ventricular Supply - B Deck (97)
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1

what is a cause of median and lateral aperature obstructions 

arnold-chiari malformation or dandy-walker cyst (CSF buildup in the lateral, 3rd, and 4th ventricles)

2

occlusion in the temporal branches of the middle cerebral a cause

inability to localize sounds

3

what do the branches of the parieto-occipital a supply

visual association cortex

4

the middle cerebral a (internal carotid branch) suppplies 

medial and lateral striate/thalamostriate

-internal capsule

-corpus striatum

-thalamus

5

occlusion in the angular artery of the middle cerebral a causes

wernicke's aphasia

-fluent in speech but can't understand spoken and written comprehension

-circumlocute with inappropriate word choices and new word creations

-receptive language disorder

6

occlusions in the frontal branches of the middle cerebral a can cause

broca's aphagia - understanding speech but unable to recipricolly communicate

7

labyrinthinitis is 

-atherosclerosis or inflammation of the labyrinthine a resulting in irritation of hte vestibulocochlear apparatus

-disturbs equilibrium and or hearing

 

8

what is the progression of an epidural hematoma

-traumatic event

-unconcious but rapid recovery

-hematoma presses on cerebral hemisphere

-causes uncal herniation

9

the pontine aa are branches off of

basilar a

10

what is frequently a cause of vasular insufficiency to globus pallidus and hippocampus in eldery

anterior choroidal a

11

what is a cause of obstruction of the cerebral aqueduct

midbrain astrocytoma (build up in the lateral and 3rd ventricles)

12

where does the internal cerebral v go

-runs next to the parahippocampal gyrus

-receives thalamostriate and anterior septal vv

-drains into the great v of galen and then to the straight sinus

13

how do you treat an epidural hematoma

evacuate the hematoma 

14

where is the 3rd ventricle

between thalami

15

where does the great vein of galen go

-runs next to the posterior portion of the corpus callosum

-receives the internal cerebral v and basal v of rosenthal

-drains into straight sinus

16

what are the clinical signs of hydrocephalus in adults 

increased intracranial pressure

papillaedema

abducens palsy (eye facing medially - lost lateral rectus m)

17

what is responsible for draining blood from the spinal cord

baston's plexus

-located in the epidural space

-empties into intervertebral vv and then segmental vv

18

what does the anterior spinal a supply

most of the central gray matter of the cord and the anteromedial portion of white matter

19

what occurs with thrombosis of superior sagittal sinus or right transverse sinus

cortical ischemia and or necrosis

20

the cerebral aa run in subarachnoid space and their branches penetrate into brain parenchyma and are surrounded by what

virchow robin space and pia mater

21

what do the temporal branches of the posterior cerebellar a supply

inferior temporal cortex

22

what type of hydrocephalus is most commonly associated with senile atrophy of the cortex (alzheimers)

supratentorial external hydrocephalus

23

the posterior circulation of the brain is handled by

vertebral a

-anterior spinal a

-posterior spinal aa

-posterior inferior cerebellar a

basilar a

-anterior inferior cerebellar a

-labyrinthine a

-superior cerebellar a

-posterior cerebal a

24

what connects the 3rd and 4th ventricles

cerebral aqueduct

25

what is internal hydrocephalus

noncommunicating type where CSF cannot drain into the subarachnoid space

-results in dilation of ventricles proximal to obstruction

26

why do we find erythrocytes in CSF

subarachnoid hemorrhage

27

what occurs with occlusion of the great v of galen

usually fatal since it drains deep brain

28

occlusion of the posterior inferior cerebellar a causees

lateral medullary syndrome/wallenberg syndrome

29

what is a cause of interventricular foramen obstruction

3rd ventricle choroid plexus ependymoma (backs up into lateral ventricle)

30

how is a subdural hematoma different from a epidural hermatoma

more insidious onset

-can have lethary, seizures, or headaches