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Neuroendocrine > 5. Dural Venous Sinus > Flashcards

5. Dural Venous Sinus Flashcards

1
Q

three dense regular connective tissue layers that separate the soft tissue of the brain from the bones of the cranium

A

cranial meninges

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2
Q

functions of the cranial meninges

A
  • encloses and protect blood vessels that supply the brain
  • contain and circulate CSF
  • some parts form veins that drain blood from brain
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3
Q

3 cranial meninges

A
  • dura mater
    • periosteal dura
    • meningeal dura
  • arachnoid mater
  • pia mater
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4
Q
  • tough membrane composed of 2 fiborus layers
  • strongest of the meninges
  • composed of 2 layers: (1) periosteal layer and (2) meningeal layer
A

dura mater

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5
Q

areas where the meningeal and the periosteal layers separate to form large, blood-filled spaces

A

dural venous sinuses

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6
Q

Identify the blue boxes.

A
  • dura mater (meningeal and periosteal layers)
  • falx cerebri
  • emissary vein
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7
Q
  • immediate internal to the dura mater
  • composed of delicate web of collage and elastic fibers
A

arachnoid mater

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8
Q

arachnoid trabeculae

A

web of collagen and elastic fibers in arachnoid mater

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9
Q

between arachnoid and overlying dura mater

A

subdural space

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10
Q

immediately deep to the arachnoid

A

subarachnoid space

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11
Q
  • innermost of the cranial meninges
    • thin layer of delicate CT tightly adheres to brain & ​follows every contour of brain surface
A

pia mater

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12
Q

4 cranial dural septa

A
  • falx cerebri
  • tentorium cerebelli
  • falx cereblli
  • diaphragma sellae
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13
Q

extensions of the meningeal layer of the dura mater deep into the cranial cavity

A

cranial dural septa

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14
Q

functions of the cranial dural septa

A

separate specific parts of the brain and provide stabilization and support

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15
Q

sinuses found within the cranial dural septa

A
  • superior sagittal sinus
  • inferior sagittal sinus
  • sigmoid sinus
  • transverse sinus
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16
Q

Identify the following septa.

A
  • (red) falx cerebri
  • (under red) diaphragma sellae
  • (right) tentorium cerebelli
17
Q

piece of dura mater superior to the hypophyseal fossa of the sphenoid bone and pituitary gland

A

diaphragm sellae

18
Q

What artery supplies the meninges?

A

middle meningeal artery (branches)

[ECA > maxillary a. > middle meningeal a. > passes through foramen spinosum]

19
Q

branches of the middle meningeal artery

A
  • frontal branch
  • parietal branch
  • mastoid branch
20
Q

innervation of the meninges

A
  • anterior meningeal branches of ethmoidal nerve (CN V1)
  • meningeal branch of maxillary nerve (CN V2)
  • meningeal branches of mandibular nerve (CN V3)
  • tentorial nerve [recurrent meningeal branch of ophthalmic nerve] (CN V1)
21
Q

Identify:

(1) area in purple
(2) area in blue
(3) area in pink
(4) area in orange
(5) gray boxes

A
  1. innervated by ophthalmic nerve (V1)
  2. innervated by maxillary nerve (V2)
  3. innervated by mandibular nerve (V3)
  4. innervated by cervical spinal nerves (C2-C3)
  5. anterior menineal branches of ethmoidal nerve, meningeal branch of maxillary nerve, meningeal branches of mandibular nerve, tentorial nerve (recurrent meningeal branch of ophthalmic nerve)
22
Q

Label the figure.

A
  1. superior sagittal sinus
  2. inferior sagittal sinus
  3. straight sinus
  4. confluence of sinuses
  5. transverse sinus
  6. sigmoid sinus
  7. cavernous sinus
  8. intercavernous sinus
  9. posterior intercavernous sinus
  10. sphenoparietal sinus
  11. superior petrosal sinus
  12. inferior petrosal sinus
23
Q

Label.

A
24
Q
A

epidural hematoma

middle meningeal artery

25
Q
A

subdural hematoma

bridging vein

26
Q
A

subarachnoid hemorrhage

cerebral arteries

27
Q

contents of the cavernous sinus

A
  • nerves that go through superior orbital fissure
  • nerves that go through the foramen rotundu
  • internal carotid artery

[mnemonic: OTOM (lateral) CAT]

28
Q

parts of the internal carotid artery

A
  • cerebral
  • cavernous*
  • petrous
  • cervical
29
Q

cavernous sinus thrombosis

A
30
Q
  • clear, colorless liquid that circulates in the ventricles and subarachnoid space
  • bathes exposed surface of CNS and surrounds it
  • functions: buoyancy, protection, stability
A

cerebrospinal fluid

31
Q

How is CSF formed?

A

formed by choroid plexus in each ventricle; produced by secretion of fluid from ependymal cells (originate from blood plasma)

32
Q

content of CSF

A

similar to blood plasma but with greater amounts of Na, H, and Ca and less K

33
Q

drainage of CSF and blood to DV sinuses

A
34
Q

subarachnoid hemorrhage

A

Neuroendocrine (30 decks)

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