Meninges and sinuses Flashcards Preview

Clinical Human Anatomy: Head and Neck > Meninges and sinuses > Flashcards

Flashcards in Meninges and sinuses Deck (35):
1

Dural venous sinus=between these two layers

meningeal+internal periostium (on bone and blends w/ meningial membrane that sticks closely together)

2

courses up into cranial vault
-supplies most of dura
-just deep to pterion (VERY THIN!)

Middle meningeal artery

3

lateral blows to head at pterion cause:

= Epidural hemitoma

4

CC: Epidural hematoma;

start to see dissection on meningeal layers away from bone, specifically periosteal layer (which wraps all way around cranial bone) Once hit suture line, ≠go further thus defiitive lensticular sizes)

5

travels on inside of skull btwn meningeal and periostal layers = extra dural~ cause a groove in bone

Middle Meningeal Artery and Vein:

6

Shearing of veins in subarachnoid space:

these guys don’t have specific shape = amorphous

7

arachnoid + space of arachnoid + pia mater, is in contact w/ CSF or space where CSF circulates

Leptomeninges:

8

Meninges and Superficial Cerebral Veins:
-beneath arachnoid layer; drain into?

into venous sinuses

9

shearing of these guys during trauma d/t fixed dura mater and mobile brain~ brain moves and these shear off and can get subarachnoid hemorrhages

Superficial cerebral veins

10

Tentorial Nerve does the posterior aspect of dura

V1

11

does the middle aspect and lateral edge of the dura

V3:

12

more anterior and internal part of dura

V2:Meningeal branch of Maxillary nerve

13

innervates most of dura

V

14

CC: responsible for dural headaches

V

15

These guys embedded w/in dura matter~

Dural Venous Sinuses:

16

w/in falx cerebri (double layer of dura) w/in outtermost layer→ drains into confluence of sinuses

Superior Sagittal sinus

17

Where does the superior sagital sinus drain into?

Confluence of sinuses

18

-Confluence of sinuses=

transvers (2) + Straight sinus (2)

19

Sinus that on either side of celica tersica
*sits close to cranial nerves

Cavernous Sinus

20

Cavernous Sinus drainage pattern

-blood drains from here →Superior Petrosal sinus

21

This sinus lies along petrossal ridge

Superior Petrosal Sinus

22

Drains →Internal Jugular Vein

Inferior Petrossal sinus

23

made of Inferior petrosal sinus + Sidgmoid Sinus as they meet

Inferior jugular vein

24

What passes through the Internal Jugular Foramen

IJV and CN 9, 10, 11

25

General flow in standing person:

Start at vortex of head→Superior Sagittal Sinus→ Confluence sinus where Transverse Sinus and Straight sinus meet up→ goes down through Transverse→Sigmoid Sinus→ becomes Internal Jugular Vein

26

Falx Cerebri superior edge =

superior sagittal sinus→ flows into confluence of sinuses

27

Falx Cerebri inferior edge=

inferior edge= inferior sagittal sinus → Straight sagittal sinus into Confluence

28

Orbital veins + pterigoid venous plexus contributions + deep facial vein dump into here

Cavernous sinus

29

Internal Jugular Vein: meets up w/ subclavian =

brachiocephalic

30

Which side is prefered for a Central line Cath: find SCM~ go btwn it’s 2 bellies

CC: Right side

31

What do these guys have in common
Facial Vein:Superior and inferior opthalmic veins
Venous plexus + Pterygoid plexus

Drain into superior sagittal sinus

32

Infection or thrombis in cavernous sinus is trouble bc what nerves are in this area?

CN III, IV, V1, V2, VI

33

Which nerve is affected first if there is infection in cavernous sinus?

VI (Abducent or lateral eye muscle so can see on eye exam and or double vision)

34

Symptoms of cavernous sinus infection

CC: Cavernous sinus or thrmobosis: issues w/ extraoccular eye muscle (VI and CN 3 and trochlear does one of them)
Stabbing pain along distribution of V1(tip of nose to forehead) and V2( lower eyelid to upper lip)
Infection from nasal cavities/sinus or directly from venous system

35

pterion made of what 4 bones

(frontal + parietal + temporal + sphenoid)