KMS - Lecture 8 & 9 - Dural Venous Sinuses

Question 1

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

Answer 1

Endothelial-lined spaces between opposed layers of dura

Question 2

What do the dural venous sinuses collect?

Answer 2

Blood and CSF

Question 3

Where do the dural venous sinuses collect from?

Answer 3

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

Question 4

What is the diploe?

Answer 4

Highly vascular layer between inner and outer tables of the calvaria

Or, some douche who makes electronic music.

Question 5

What are the emissary veins?

Answer 5

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

Question 6

Do the emissary veins have valves?

Answer 6

No

Question 7

What is the ultimate destination for the sinuses?

Answer 7

Internal jugular vein

Question 8

How many sinuses do we learn about?

Answer 8

12

Question 9

Where does the superior sagittal sinus end?

Answer 9

Confluens of sinuses

Question 10

What vessels does the superior sagittal sinus collect from?

Answer 10

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

Question 11

Where does the inferior sagittal sinus end?

Answer 11

Straight sinus

Question 12

What does the inferior sagittal sinus drain?

Answer 12

Cerebral veins

Meningeal veins

Question 13

Where does the straight sinus end?

Answer 13

Confluens of sinuses

Question 14

What does the straight sinus drain?

Answer 14

Inferior sagittal sinus

Great cerebral vein - drains core of cerebrum

Question 15

Where does the transverse sinus end?

Answer 15

sigmoid sinus

Question 16

What is the transverse sinus a continuation of?

Answer 16

Right transverse sinus - continuation of superior sagittal sinus

Left transverse sinus - continuation of straight sinus

Question 17

What does the sigmoid sinus become confluent with?

Answer 17

jugular bulb at jugular foramen

Question 18

What does the sigmoid sinus drain?

Answer 18

Superior petrosal sinus at juncture with transverse sinus

Inferior petrosal sinus at juncture with jugular bulb

Question 19

Where does the occipital sinus drain?

Answer 19

Confluens of sinus

Question 20

What vessels does the occipital sinus drain?

Answer 20

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

Question 21

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

Answer 21

Juncture for:
Superior sagittal
Straight
Transverse 
Occipital sinuses

Occurs in 30-40% of individuals

Question 22

Where is the sphenoparietal sinus?

Answer 22

Along posterior edge of the lesser wing of sphenoid bone

Question 23

What does the sphenoparietal sinus drain?

Answer 23

Drains dura to cavernous sinus

Question 24

What does the cavernous sinus communicate with?

Answer 24

Anterior and posterior to sella turcica

- via anterior and posterior intercavernous sinuses

Question 25

What does the outer wall of the cavernous sinus house?

Answer 25

CNs III, IV, V1, V2

Question 26

What is internal to the cavernous sinus?

Answer 26

Internal carotid | CN VI

Question 27

What does the cavernous sinus drain?

Answer 27

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

Question 28

How do the bilateral cavernous sinuses communicate with each other?

Answer 28

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

Question 29

How does the cavernous sinus drain itself?

Answer 29

Posteriorly via superior and inferior petrosal sinuses

Question 30

What does the superior petrosal sinus drain?

Answer 30

Cavernous sinuses | - posterior to junction of transverse and sigmoid sinuses

Question 31

What vessels does the superior petrosal sinus drain?

Answer 31

Cerebral Cerebellar Tympanic veins

Question 32

Where does the inferior petrosal sinus drain?

Answer 32

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

Question 33

What vessels does the inferior petrosal sinus receive?

Answer 33

Veins of pons, medulla, and inferior cerebellum

Question 34

Where is the basilar plexus?

Answer 34

on basilar portion of the occipital bone

Question 35

Where does the basilar plexus drain?

Answer 35

"marginal" portion of the occipital sinus

Question 36

What vessels does the basilar plexus receive?

Answer 36

Connects inferior petrosal sinuses Receives the anterior internal vertebral venous plexus