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Neuro > KMS - Lecture 8 & 9 - Dural Venous Sinuses > Flashcards

KMS - Lecture 8 & 9 - Dural Venous Sinuses Flashcards

1
Q

In a general sense, what are the dural venous sinuses?

A

Endothelial-lined spaces between opposed layers of dura

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2
Q

What do the dural venous sinuses collect?

A

Blood and CSF

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3
Q

Where do the dural venous sinuses collect from?

A 
Brain via bridging veins
Meninges
Diploe
Vertebral column - via vertebral venous plexus
Emissary veins
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4
Q

What is the diploe?

A

Highly vascular layer between inner and outer tables of the calvaria

Or, some douche who makes electronic music.

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5
Q

What are the emissary veins?

A

Veins which communicate between the dural sinuses and the veins of the scalp or diplo.

Receives blood from the:
Face 
Orbit
Nasal cavity
Parietal
Mastoid
Occiput
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6
Q

Do the emissary veins have valves?

A

No

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7
Q

What is the ultimate destination for the sinuses?

A

Internal jugular vein

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8
Q

How many sinuses do we learn about?

A

12

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9
Q

Where does the superior sagittal sinus end?

A

Confluens of sinuses

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10
Q

What vessels does the superior sagittal sinus collect from?

A 
Emissary veins
cerebral veins
meningeal veins
diploic veins
CSF - via arachnoid granulations at venous lacunae
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11
Q

Where does the inferior sagittal sinus end?

A

Straight sinus

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12
Q

What does the inferior sagittal sinus drain?

A

Cerebral veins

Meningeal veins

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13
Q

Where does the straight sinus end?

A

Confluens of sinuses

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14
Q

What does the straight sinus drain?

A

Inferior sagittal sinus

Great cerebral vein - drains core of cerebrum

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15
Q

Where does the transverse sinus end?

A

sigmoid sinus

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16
Q

What is the transverse sinus a continuation of?

A

Right transverse sinus - continuation of superior sagittal sinus

Left transverse sinus - continuation of straight sinus

17
Q

What does the sigmoid sinus become confluent with?

A

jugular bulb at jugular foramen

18
Q

What does the sigmoid sinus drain?

A

Superior petrosal sinus at juncture with transverse sinus

Inferior petrosal sinus at juncture with jugular bulb

19
Q

Where does the occipital sinus drain?

A

Confluens of sinus

20
Q

What vessels does the occipital sinus drain?

A

Surrounds foramen magnum as the marginal sinus to communicate with basilar sinus

21
Q

What is the confluens of sinuses a juncture for? How common is it?

A 
Juncture for:
Superior sagittal
Straight
Transverse 
Occipital sinuses

Occurs in 30-40% of individuals

22
Q

Where is the sphenoparietal sinus?

A

Along posterior edge of the lesser wing of sphenoid bone

23
Q

What does the sphenoparietal sinus drain?

A

Drains dura to cavernous sinus

24
Q

What does the cavernous sinus communicate with?

A

Anterior and posterior to sella turcica

- via anterior and posterior intercavernous sinuses

25
Q

What does the outer wall of the cavernous sinus house?

A

CNs III, IV, V1, V2

26
Q

What is internal to the cavernous sinus?

A

Internal carotid

CN VI

27
Q

What does the cavernous sinus drain?

A

Superior opthalmic vein
Sphenoparietal sinus
Cerebral veins
Emissary veins from pterygoid plexus

28
Q

How do the bilateral cavernous sinuses communicate with each other?

A

via intercavernous sinuses

- located in diaphragma sellae anterior and posterior to hypophysial stalk

29
Q

How does the cavernous sinus drain itself?

A

Posteriorly via superior and inferior petrosal sinuses

30
Q

What does the superior petrosal sinus drain?

A

Cavernous sinuses

- posterior to junction of transverse and sigmoid sinuses

31
Q

What vessels does the superior petrosal sinus drain?

A

Cerebral
Cerebellar
Tympanic veins

32
Q

Where does the inferior petrosal sinus drain?

A

Drains the cavernous sinus posteriorly to the junction of the sigmoid sinus and jugular bulb

33
Q

What vessels does the inferior petrosal sinus receive?

A

Veins of pons, medulla, and inferior cerebellum

34
Q

Where is the basilar plexus?

A

on basilar portion of the occipital bone

35
Q

Where does the basilar plexus drain?

A

“marginal” portion of the occipital sinus

36
Q

What vessels does the basilar plexus receive?

A

Connects inferior petrosal sinuses

Receives the anterior internal vertebral venous plexus

Neuro (17 decks)

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