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Anatomy Exam 2 > Meninges > Flashcards

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
Q

What is this hematoma:

  • bleeding: between dura and arachnoid mater
  • source: venous, usually cortical vein/dural sinus
A

Subdural hematoma

26
Q

What is this hematoma:

  • bleeding: within subarachnoid space
  • source: usually cerebral artery
A

Subarachnoid hematoma

27
Q

What is this hematoma:

  • bleeding: between pia and cortex of brain
  • source: usually cerbral artery (middle)
A

Intracerebral (Subpial) Hematoma

28
Q

What connects the dural venous sinuses with veins outside the cranium?

A

Emissary veins

29
Q

What drains inferiorly through the superior and inferior petrosal sinuses and emissary veins to the basilar and pterygoid plexuses?

A
  • Cavernous sinus
30
Q

Describe the flow of CSF around the brain

A
  • 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
Q

What is inside the cavernous sinus?

A
  • 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
Q

How is CSF returned to blood stream?

A
  • Via arachnoid granulations and villi
33
Q

CSF drains primarily into what sinus?

34
Q

What meningeal space contains CSF?

A

Subarachnoid

Anatomy Exam 2 (18 decks)

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