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Med School Yr 2 > Ventricles + CSF > Flashcards

Ventricles + CSF Flashcards

1
Q
A
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2
Q

Label the ventricles

A

Birds eye view

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3
Q

Label the layers of the meninges

A
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4
Q

label the ventricles

A
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5
Q

what is the role of the ventricular system of the brain?

A

cavities that produce, transport and remove CSF

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6
Q

what cells line the ventricles of the brain?

A

ependymal cells

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7
Q

what are the 3 main functions of CSF?

A
  • protection
  • buoyancy - reduces net weight by 25g, preventing excess pressure on base of brain
  • chemical stability - eg. maintaining low extracellular K+ for synaptic transmission
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8
Q

the ependymal cells that line the ventricles of the brain form a plexus - what is this called?

A

choroid plexus

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9
Q

what produces CSF within the ventricles of the brain?

A

choroid plexus

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10
Q

embryologically, what is the ventricular system derived from?

A

lumen of the neural tube

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11
Q

how many ventricles are there in the brain?

A

4

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12
Q

what are the four ventricles of the brain?

A

right lateral ventricle
left lateral ventricle
third ventricle
fourth ventricle

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13
Q

what happens to the lateral ventricle as a person ages?

A

the volume increases

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14
Q

where are the lateral ventricles located?

A

respective hemispheres of the cerebrum

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15
Q

what connects the third ventricle to the lateral ventricles?

A

foramen of monro

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16
Q

what is the role of the foramen of monro

A

connects the thrid ventricle to the lateral ventricles

17
Q

the anterior surface of the third ventricle contains two protrusions - what are they?

A
  • supra-optic recess
  • infundibular recess
18
Q

what connects the third ventricle and the fourth ventricle?

A

cerebral aqueduct

19
Q

where is the third ventricle located?

A

between right and left thalamus

20
Q

where is the fourth ventricle located?

A

within the brainstem - junction of pons and medulla oblongata

21
Q

from the 4th ventricle, where does CSF drain?

A

central spinal canal
subarachnoid cisterns

22
Q

what allows fluid to drain into the dural venous sinuses?

A

arachnoid granulations

23
Q

What is the foramen magenie/median aperture?

A
  • Links fourth ventricle and cisterna magna
  • 1/3 ways CSF can enter sub-arachnoid space
24
Q

What is the foramen Luschka/ lateral apertures?

A
  • Links 4th ventricle to cerebellopontine cistern
  • 2/3 ways CSF enters sub-arachnoid space
25
Q

How does CSF leave the ventricular system and enter the sub-arachnoid space?

A

Via 3 apertures - foramen magenie and foramen luschka

26
Q

label the ventricular system

Med School Yr 2 (96 decks)

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