KMS - Lecture 8 & 9 - Dural Venous Sinuses Flashcards Preview

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

Flashcards in KMS - Lecture 8 & 9 - Dural Venous Sinuses Deck (36):
1

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

Endothelial-lined spaces between opposed layers of dura

2

What do the dural venous sinuses collect?

Blood and CSF

3

Where do the dural venous sinuses collect from?

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

4

What is the diploe?

Highly vascular layer between inner and outer tables of the calvaria

Or, some douche who makes electronic music.

5

What are the emissary veins?

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

6

Do the emissary veins have valves?

No

7

What is the ultimate destination for the sinuses?

Internal jugular vein

8

How many sinuses do we learn about?

12

9

Where does the superior sagittal sinus end?

Confluens of sinuses

10

What vessels does the superior sagittal sinus collect from?

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

11

Where does the inferior sagittal sinus end?

Straight sinus

12

What does the inferior sagittal sinus drain?

Cerebral veins
Meningeal veins

13

Where does the straight sinus end?

Confluens of sinuses

14

What does the straight sinus drain?

Inferior sagittal sinus
Great cerebral vein - drains core of cerebrum

15

Where does the transverse sinus end?

sigmoid sinus

16

What is the transverse sinus a continuation of?

Right transverse sinus - continuation of superior sagittal sinus

Left transverse sinus - continuation of straight sinus

17

What does the sigmoid sinus become confluent with?

jugular bulb at jugular foramen

18

What does the sigmoid sinus drain?

Superior petrosal sinus at juncture with transverse sinus

Inferior petrosal sinus at juncture with jugular bulb

19

Where does the occipital sinus drain?

Confluens of sinus

20

What vessels does the occipital sinus drain?

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

21

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

Juncture for:
Superior sagittal
Straight
Transverse
Occipital sinuses

Occurs in 30-40% of individuals

22

Where is the sphenoparietal sinus?

Along posterior edge of the lesser wing of sphenoid bone

23

What does the sphenoparietal sinus drain?

Drains dura to cavernous sinus

24

What does the cavernous sinus communicate with?

Anterior and posterior to sella turcica
- via anterior and posterior intercavernous sinuses

25

What does the outer wall of the cavernous sinus house?

CNs III, IV, V1, V2

26

What is internal to the cavernous sinus?

Internal carotid
CN VI

27

What does the cavernous sinus drain?

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

28

How do the bilateral cavernous sinuses communicate with each other?

via intercavernous sinuses
- located in diaphragma sellae anterior and posterior to hypophysial stalk

29

How does the cavernous sinus drain itself?

Posteriorly via superior and inferior petrosal sinuses

30

What does the superior petrosal sinus drain?

Cavernous sinuses
- posterior to junction of transverse and sigmoid sinuses

31

What vessels does the superior petrosal sinus drain?

Cerebral
Cerebellar
Tympanic veins

32

Where does the inferior petrosal sinus drain?

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

33

What vessels does the inferior petrosal sinus receive?

Veins of pons, medulla, and inferior cerebellum

34

Where is the basilar plexus?

on basilar portion of the occipital bone

35

Where does the basilar plexus drain?

"marginal" portion of the occipital sinus

36

What vessels does the basilar plexus receive?

Connects inferior petrosal sinuses

Receives the anterior internal vertebral venous plexus