meninges Flashcards
outward in order of meninges
dura mater, arachnoid mater, pia mater
what is adherent ot the arachnoid mater
dura mater
usually no subdural space but there is a space between dura mater and arachnoid mater if there is
bleeding
subarachnoid space is between what and filled with
between arachnoid and pia mater
fileld with cerebrospinal fluid
where find cisterna magna
cistern between cerebellum and brainstem
what is csf
ultrafiltrate of blood
where csf come from
chroid plexus in ventricles
the csf goes to () space and then reenters the blood via the ()
subarachnoid space
arachnoid granulations/vili
where find arachnoid granulations
project into superior sagittal sinus
which is a very thin, highly vascularized membrane made of loose ct
pia mater
what does the pia mater dip into
sulci and fissues of brain (carrying blood vessels in it)
where do cerebral veins run on
on the pia within the subarachnoid space
what do the cerebral veins form
the tela choroidea
what does the tela choroidea becomes when it fuses with ependyma
choroid plexu
what are gyrus
convoluted elevation of the brain cortical tissue
which meninge layer is a delicate transparent membrane composed of web-like tissue
arachnoid mater
the arachnoid goes over the () not in it
sulci/fissures
what separates the dura mater and the arachnoid mater
subdural space
what separates the arachnoid and pia matter
subarachnoid space
what does the subarachnoid space contain
csf
what are cisterns
dilated portions of subarachnoid space
what are arachnoid villi
tufted prolongations of pia-arachnoid which protrude through the meningeal layer of the dura mater
cisterns in spinal cord is found where
lumbar cistern where dilation of subarachnoid space so get csf collection for spinal tap
collections of arachnoid vili form
arachnoid granulations
where do you find the arachnoid granulations
margin of superior sagittal sinus
the spongy tissue of the vilus contain tubules that serve as
one-way valves for transfer of csf from subarachnoid space to the venous system
what are the majore site of fluid transfer
vili and granulations
what is the outermost and tough covering of cns
dura mater
what does the dura mater consist of
connective tissue
what is the dura mater describes as
two layers membrane
what is the dura mater 2 layers membrane made up of
periosteal layer meningeal layer (fuse at some parts)
what does the meningeal layer form
dural sheaths/epineureiums of the cranial nerves
the dura mater forms four inwardlay projectiong septa or folds called
dural septa
what are the dural sinuses
venous channels between the meningeal and periosteal layers of dura mater
where is falx cerebri
between two cerebral hemispheres
tentorium cerebelli
occipital lobe from the cerebellum
falx cerebelli
between two cerebellar hemispheres
diaphragm sellae
roof over sella turcica
what is dural septa
inward extensions of dura matter
function of dural septa
keeps brain in place, supports ti so prevent movement
attachment of falx cerebri
anteriorly: christa galli and fromtal crest
posteriorly: iop
attachment of tentorium cerbelli
anteriorly: crest of petrous portion of temporal bone
posteriorly: groove of transver sinus
attachments of falx cerebelli
iop to foramen magnum along internal occipital crest
what septa has a central opening for the pituitary infundibulum/stalk
diaphragm sellae
superior sagittal sinus is located along
superior convex margin of falx cerebri
inferior saggital sinus is where
inferior border of falx cerebri
straight sinus is where
line of attachment of falx cerebri to the tentorium cerebelli
what joins the inferior saggital sinus to become the straight
great cerebreal vein/ great cerebreal of galen
transverse sinus occupies
posterior margin of tentorium cerebelli
sigmoid sinus grooves the () part of temporal bone
mastoid
sigmoid sinus begins as continuation of
transverse sinus
sigmoid sinus is continuous with the
bulb of internal jugular vein at jugular foramen
occipital sinus communicates with () and ()
internal vertebral venous plexus and confluence
smallest dural sinus
occipital
where is confluence of sinueses
internal occipital protuberance
what make upt he confluence of sinuses
superior sagittal, straight, transverse, occipital
superior petrosal sinus runs along
superior edge of petrous portion of temporal bone
inferior petrosal sinus drains the () directly into () vein
cavernous sinus , internal jugular
what does the inferior petrosal sinus receive
cerebellar, labryrinthine veins
sphenopareital sinus runs along margin of ()
lesser wing of sphenoid bone
superior petrosal sinus provides a connecteion between the () and () sinus
cavernous and transeverse
the inferior petrosal sinus connexts what
cavernous sinus and internal jugular vein
cavernous sinus lactedon
sides of sella turcica nad body of sphenoid bone
what passes through the cavernous sinus
ICA, abducent nerve
what is found on lateral wall of cavernous sinus
cranial nerve 3, 4, V1 V2
basilar sinus consists of
interconnecting venous channels on the clivus
basilar sinus connects 2 () and communicates with()
2 inferior petrosal sinuses
com: internal vertebral venous plexus
if rupture ICA get high pressure and edema behind eye which causes
pulsating exopthalamus UNILATERALLY
arteries of dura mater 3
anterior meningeal artery, middle meningeal artery, posterior meningeal artery
anterior meningeal a is branch of
anterior ethmoidal a
middle mening a branch of
maxillary a.
what is the main blood source of dura mater
middle meningeal a
middle mening enters the cranium though ()
foramen spinosum
posterior meningeal a is branch of
ascending pharyngeal, occipital, vertebral a
middle meningeal veins exit through
foramen ovale and spinosum
midd men v exits and joins teh
pterygoid plexus of veins
the pterygo plexus becomes () vein
maxillary vein
the maxillary vein joins the () to become the retromandibular v
temporal
the anterior and posterior meningeal veins empty primarily into
dural sinuses of anterior and posterior cranial fossa
emissary veins connect the intracranial venous sinuses with () veins
extracranial
true or false dura mater is sensitive to pain
TRUE
why lay down after spinal tap
brain dural sinuses sag and cause spinal headave
sensory supply to dura mater
trigeminal nerve , c1,c2, c3
sensory supply og anterior cranial fossa of dura
v1,2,3
supply floor of middle cranial fossa
meningeal branches of v2, v3 (follows middle meningeal a)
tentorium cerebelli and posterior falx cerebri supplied by
tentorial branch of v1
anterior part of falx cerebri supplied by
anterior meningeal branch of v1
the c1-3 of senseorysupply to dura tranves through
vagus and hypoglassal nerves
c1-3 supplys dura of the ()
floor of posterior cranial fossa
