CSF, Ventricles, and Meninges Flashcards Preview

Neuro Block 1 > CSF, Ventricles, and Meninges > Flashcards

Flashcards in CSF, Ventricles, and Meninges Deck (20):
1

the meninges is composed of these 3 layers..

1) Dura

2) Arachnoid

3) Pia

2

what is the dura?

what are the 2 layers that make it up?

these layers are close to what structure?

both these layers separate only when?

what is another name for the dura?

Tough, outermost layer of the meninges that follows the contour of the skull.

1) Endosteal layer = close to the skull

2) Meningeal layer = close to the meninges

 

these  2 layers separate only when they form the sinuses

pachymeninx

3

where do we find the arachnoid layer?

where do we find the pia layer?

what is the name given to the space in between the arachnoid and the pia?

beneath the dura

beneath the arachnoid, following the brain surface

the subarachnoid space

4

what do we find in the subarachnoid space?

arteries, veins and CSF

5

what connects the arachnoid to the pia?

what is another name for the arachnoid and the pia?

 

trabeculae = ligaments

leptomeninges

6

what is the most common place for a subdural hematoma?

what are the 2 meningeal layers inflammed in meningitis?

the area close to the superior sagittal sinus above the falx cerebri

leptomeninges

7

what is the blood supply to the meninges?

  • Internal carotid
  • Maxillary
  • Ascending pharyngeal
  • Occipital
  • Vertebral

8

what do you call the trabeculae that are in the spinal cord?

denticulate ligaments

9

from where does the middle meningeal artery branch off?

where do we find the middle meningeal artery running through?

Where do we need to get hit in order to damage the middle meningeal artery and get a epidural hematoma?

from the maxillary artery coming from the internal carotid

under the pterion

in the side of the head, at the pterion

10

what is the function of the tentorium cerebelli?

what is the function of the falx cerebri?

restrict side to side movement

restrict side to side movement

11

what is meningitis?

what are the symptoms?

bacterial or viral infection that affects the leptomeninges and spinal cord

high fever, stiff neck, headaches, nausea and vomiting, photophobia and nuchal rigidity.  Can be of sudden onset.  Confusion, disorientation and  difficulty waking up are key signs.

12

what is the ventricular system?

what is the CSF?

it is the lining in the brain that makes CSF

fluid that cushions the brain, maintains its shape through bouyancy, removes waste and provides a pathway for horomes

13

what is the total amount of CSF in the brain?

what is the normal pressure of CSF?

why is it important to know this?

what is the average amount of CSF produced?

125-150 mL

150-180 mm Hg

important in order to do a lumbar puncture

400-500 mL/day

14

what is the Ventricular pathway?

(the pathway CSF follows)

 lateral ventricles > foramina of monroe or interventricular foramen > 3rd ventricle

 

3rd ventricle > Cerebral aqueduct (aqueduct of Sylvius) > 4th ventricle

 

4th ventricle -> central cannal of spinal cord and subarachnoid space  (median aperture = magendi, and 2 lateral = Lushka)

15

identify the parts of the ventricular system

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16

what are the 3 foramens used by the CSF in order to leave the Ventricular system?

where do each go?

1) Medial = Magendie = to the medial canal of the spinal cord

2) Lateral = Lushka = the subarachnoid space

3) Lateral = Lushka = the subarachnoid space

17

what are the cysterns foudn in the ventricular system?

Large spaces in the subarachoid space where the arachnoid membrane does not closely follow the surface of the brain.

18

Identify the cisterns

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19

how does CSF get out of the brain?

It drains into the sinuses via extensions from the subarachnoid space called subarachnoid granulations (villa) 

20

what are these?

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arachnoid granulations