Meninges Flashcards

1
Q

A cut through what layer in the scalp would result in a gaping wound?

A

Aponerosis

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2
Q

What layer of scalp does infection spread through?

A

Loose connective

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3
Q

What are the two layers of the Dura?

A
  • Periosteal
    • fused to bone
  • Meningeal
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4
Q

What layer of Dura forms sinuses?

A

meningeal

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5
Q

Where does the middle meningeal artery sit?

A
  • In between two layers of the dura
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6
Q

What layer of dura continues into the spinal cord?

A

meningeal

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7
Q

What part of the arachnoid matter gives structure to subarachnoid space and make it a real space?

A

Arachnoid trabeculae

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8
Q

Whar part of arachnoid transverses the meningeal dura into dural venous sinuses?

  • continues as arachnoid into venous system and allows for drainage into venous from CSF
A
  • Arachnoid granulations
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9
Q

What layer of the meninges is adherent to the brain and highly vascularized?

  • you cant really pick it out
A

Pia

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10
Q

What dural partition seperates the right and left cerebral hemispheres?

  • largest infolding
  • in the longitudinal cerebral fissure
A

Falx Cerebri

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11
Q

What dural partition seperates cerebrum from cerebellum?

  • 2nd largest
  • falx cerebri attaches to this and help to hold it up
A

Tentorium Cerebelli

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12
Q

What dural partition seperates right and left cerebellum?

A

Falx cerebelli

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13
Q

What dural partition is an opening for infundibulum?

  • makes house for pituitary to sit on
A

Diaphragma sellae

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14
Q

What do the dural venous sinuses drain?

A
  • Dipolic veins
  • emissary veins
  • CSF
    • all of these are drained into internal jugular vein via the venous sinuses
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15
Q

What dural venous sinus drains into the internal jugular vein?

A

Sigmoid

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16
Q

What drains the cavernous sinus?

A

Superior petrosal and inferior petrosal

17
Q

Where is the CSF made?

A

Choroid plexus of the ventricles

18
Q

What is hyrdocephalus?

A
  • overproduction of CSF, obstruction of CSF flow, or interferance with CSF absorption results in excess fluid in the cerebral ventricles and enlargement of the head
  • obstruction usually occurs in the cerebral aquaduct
  • water on the brain
19
Q

Arteries of the Dura supply more blood to what?

A
  • Calavria (bone) than dura
20
Q

Is the epidural space in brain a real space or potential space?

  • between cranium and periosteal layer
A

Potential

  • shouldnt be there
21
Q

Is the subdural space in brain a real space or potential space?

  • dural-arachnoid interface
    • between dura and aracnoid
A

Potential space

  • shouldnt be there
22
Q

Is the subarachnoid space in brain a real space or potential space?

  • between arachnoid and pia
A
  • real space-should be there
  • contains CSF, arteries (circle of willis) and veins
  • arachnoid tubercle give structure to this space
23
Q

Is the subpial space in brain a real space or potential space?

  • between pia and cortex of brain
A
  • potential space-shouldnt be there
24
Q

What is this hematoma:

  • bleeding: between cranium and periosteal dura
  • source: usually middle meningeal artery
  • common site: fracture of squamous temporal bone or pterion
A

Epidural hematoma

25
What is this hematoma: * bleeding: between dura and arachnoid mater * source: venous, usually cortical vein/dural sinus
Subdural hematoma
26
What is this hematoma: * bleeding: within subarachnoid space * source: usually cerebral artery
Subarachnoid hematoma
27
What is this hematoma: * bleeding: between pia and cortex of brain * source: usually cerbral artery (middle)
Intracerebral (Subpial) Hematoma
28
What connects the dural venous sinuses with veins outside the cranium?
Emissary veins
29
What drains inferiorly through the superior and inferior petrosal sinuses and emissary veins to the basilar and pterygoid plexuses?
* Cavernous sinus
30
Describe the flow of CSF around the brain
* Leaves the lateral ventricles through the interventricular foramina and enters the 3rd ventricle * Then it passes through the cerebral aquaduct into the 4th ventricle * Some CSF leaves this ventricle through its median and lateral apertures and enters the subarachnoid space, which is continuous around the spinal cord and over the cerebellum * most CSF flows into interpeduncular and quandragernial cisterns * Lateral ventricle-\>interventricular foramen-\>3rd ventricle-\> cerebral aquaduct-\>4th ventricle-\>subarachnoid space
31
What is inside the cavernous sinus?
* CNs 3, 4, V1, V2 in the lateral walls * Contains CN6 adn internal carotid artery surrounded by carotid plexus of sympathetic nerves within sinus
32
How is CSF returned to blood stream?
* Via arachnoid granulations and villi
33
CSF drains primarily into what sinus?
Sagittal
34
What meningeal space contains CSF?
Subarachnoid