Cranial Meninges Flashcards
* = bolded words or highlighted pts by hiim
*What are the layers of the meninges surrounding the brain and SC
Dura Mater
Arachnoid mater
Pia mater
*_____ dura is adherent to the arachnoid mater
cranial dura
The space btw the dura and arachnoid mater occurs only if there is ______
bleeding
c.c. There is only a ______ space when there is bleeding in the cranial region
SUBDURAL space
- The ______ space is the space btw the arachnod and pia mater
subarachnoid space
- ____________ space is filled with CSF
subarachnoid space
CSF returns to blood via _____
arachnoid granulations
The arachnoid granulosus projects into the _____
superior sagittal sinus
______ is the dilated area of subarachnoid space btw cerebrellum and the brain stem
cisternal magnum
What two layers make up the Dura Mater in the cranial region
periosteal layer- against bone
meningeal layer - against arachnoid mater
______ layer of the dura mater comes into contact with the arachnoid mater
meningeal layer
Is the Pia mater avascular/ vascular?
vascular
_______ mater dips into the sulci and fissures of the brain
pia mater
What is on the anterior surface of the head?
FACE!!!
hahah got ya!
_____ veins run on the pia mater within the subarachnoid space
cerebral veins
cerebral veins run within the _____ space
subarachnoid space
Where is CSF produced
choroid plexus
located in the ventricles
Cerebral veins form the _______ that fuses with ependyma to form the ______
veins form- tela choroidea
forms- choroid plexuses
_____: the thin epithelial membrane lining the ventricular system of the brain and the spinal cord.
ependyma
type of neuroglia
- ____mater passes over the sulci
arachnoid
_____ space contains CSF
subarachnoid space
- The subarachnoid space has dilated portions called _____
cisterns
- Collections of ______ form arachnoid granulations
arachnoid villi
prolongations of pia-arachnoid
_____: a term used to refer to the pia mater and arachnoid mater
leptomeninges
_____layer of the dura mater form dural sheaths of the cranial nerves
meningeal layer
_______ become the epineurium of the CN
dural sheaths
formed by the meningeal layer of the dura mater
_____ form inward projecting septa called dural septa
dura mater
____ are venous channels btw the meningeal and periosteal layers
dural sinuses
- dural sinuses are found btw the ____& ___ layers
meiningeal layer
periosteal layer
(of the dura mater)
c.c Epidural hematoma if the ______ breaks
pterion
c.c. What artery if affected if the pterion breaks
middle meningeal artery
c.c. What area is affected if there is a epidural hemotoma of the middle meningeal artery (on Left side)
Brocca’s area = affects speech
c.c______ space is effected if there is hemorrhage that separates the dura mater from the bone
cranial extradural space
In the spinal dura mater there is only the ______ layer
meningeal layer
no periosteum layer
two branches of the middle meningeal artery
frontal artery
parietal artery
_____ are inward extensions of the dura mater
dural septa
name 4 dural septa
falx cerebri
tentorium cerebelli
falx cerebelli
diaphragm sellae
______ is the dural septa that is located in the longitudinal fissure. It separates the two cerebral hemispheres
falx cerebri
flaxi cerebri is located in the _____ fissure. It separates the _____ hemispheres
longitudinal fissures
separates cerebral hemispheres
____: is the dural septa that separates the occipital lobe from the cerebrellum
tentorium cerebelli
the tentorium cerebelli separates the ______ lobe from the ___
occipital lobe from the cerebrellum
aka cerebrum and cerebellum
______ is a medial dural fold btw the two cerebellar hemispheres
falx cerebelli
falx cerebelli separates the two _____ hemispheres
cerebellar hemispheres
_____: is the dural septa that forms a roof over the sella turcica
diaphragm sellae
fxn of the dural septa
prevents lateral displacement of the brain
Falx cerebri attachments
ant- crista galli & frontal crest
Post- IOP
falx cerebelli boney attachments
IOP along the int. occipital crest
- foramen magnum
Diaphragma sellae boney attachments
clinoid process of the sella turcia
Where is the pituitary gland houses
sella tursica
through what dura septa is the opening for the infadibullium to pass through
diaphragma sellae
The infadibulla is the connection btw which two structures
hypothalmus & pituitary gland
_____: a spacialized venous channel that is formed btw the 2 layers of the dura
dural sinuses
___ sinus is located along the superior convex margin of falx cerebri
superior sagittal sinus
_____ sinus is located along the inferir free boarder of falx cerebri
inferior sagittal sinus
____ sinus is located at the line of the falx cerebri and the tentorium cerebelli
straight sinus
_____sinus: occupies the attached margin of the tentorium
transverse sinus
___sinus: grooves the mastoid part of the temporal bone. It begins at the conti of the trasnverse sinus
sigmoid sinuse
The sigmoid sinus comes from the transverse singus and drains into the ____
IJV
@ the jugular foramen
_____ sinus : communicates with the internal vertebral venous plexus and confluence
occipital sinus
Which sinuses meet at the confluence sinuses
T: transverse
O: occipital
S: superior sagittal
S: straight
_____ sinus is located at the IOP
confluence
___sinus: runs along the superior edge of the petrous portion of the temporal bone
superior petrosal sinus
superior petrosal sinus runs along what bone
temporal
_______ sinus: drains the cavernous sinus into the IJV
inferior petrosal sinus
receives cerebellar & labyrinthine
____sinus runs along the margin of the lesser wing of the sphenoid
sphenopartietal sinus
_____sinus : located on each side of the sella turcia
cavernous sinuses
What structures pass through the cavernous sinus
ICA
CN: 3,4,5 (V1,V2), 6
(oculomotor, trochlear, opthalmic, maxillary, abducens)
___sinus is located on the clivus
basilar sinus
basilar sinus connects the two _____ sinus and communicates with ____ plexus
inferior petrosal sinuses
internal vertebral venous plexus
cc an anurism of the ICA is going to cause high pressure on the arteries and veins in the cavernous sinus . This will then cause pressure on the _____N
opthalmic N
anterior meningeal artery is a branch of ____ artery
anterior ethmoidal artery
middle miningeal artery is a branch of the ____ artery
maxilary artery
The middle meningeal artery enters the cranial cavity throgh the _____foramen
spinosum
Posterior meingeal arteries are branches of which 3 arteries
ascending pharyngeal
occipital ( through mastoid branch)
vertebral
Middle meningeal vein exits through what foramen
foramen ovale and spinosum
The middle meningeal vein joins with the ____ plexus
pterygoid plexus
Anterior and posterior meningeal veins drain into ____
dural sinuses of the anterior and posterior cranium
The dura mater is sensitive to ____
pain
sensitive to stretch of the meninges = HA
Where are stretch receptors more abundant?
near the arteries and veins
cc ______: when CSF is drained during a spinal tap pressure is put on the dural sinuses and causes them to sag
spinal HA
What CN supplies sensory to the meninges
Trigeminal
What root level nerves supply the meninges
C1,C2,C3
What CN nerves supply sensory to the anterior cranial fossa
V1,V2,V3
What CN supplies sensory to the floor of the middle cranial fossa
V2,V3
The tentorial branch of V1 supplies what structures
tentorium cerebell and posterior part of the falx cerebri
What nerve gives off the tentorial N branch
V1: opthalmic
What N gives off the anterior meningeal branch?
V1: opthalmic
What does the anterior meningeal branch of V1 supply?
anterior portion of the falx cerebri
Nerve roots that supply the posterior cranial fossa
C1,2,3
run through the hypoglossa and vagus nerves
What nerves carry C1-3 N for the posterior cranial Fossa
hypoglossal
vagus
