Meninges, Ventricles, and CSF Flashcards
What are the 2 layers of dura mater
periosteal and meingeal
what are the true spaces in the brain
epidural and subdural
if you get a bleed from the middle minigeal a where would it be located
between bone and periosteal layer
which layer dives down into large fissures
meningeal
bleed adjacent to bone is called
epidural hematoma
bleed in space lying between mningeal dura adn arachnoid mater is called
subdural hematoma
shape of epidural hematoma
lens shaped
does epidural hematoma cross hemispheres
yes
shape of subdural hematoma
sickle-shaped
does subdural hematoma cross hemispheres
no - stoped by falx cerebrum
function of falx cerebri
separate L and R hemisphere
anterior attachment of falx cerebri
crista galli
posterior attachment of falx cerebri
internal occipital protuberance
function of tentorial cerebellum
separate cerebellum from rest of brain
what is unique about sinuses
no smooth muscle or valves
where is superior sagittal sinus located
on upper margin
where is inferior sagirttal sinus located
on free edge of falx cerebri
what does inferior sagittal sinus drain into
straight sinus
what do all the sinuses drain into
confluence of sinuses
where is cavernous sinus located
front
arachnoid mater
translucent layer that lies allong surface of cerebral cortex, does not enter sulci
collagenous traveculae
form web-like structure
subarachnoid mater
goes over the surface of brain but doesn’t dive into sulci, but certain areas have large gaps
subarachnoid cisterns
fluid filled spaces that are overlaid by arachnoid mater
interpedunucular cisterm
lies between 2 peduncles
pontine cistern
at junction between pons and medulla
superior cistern (cistern of great cerebral vein)
between cerebellum and occipital lobe
arachnoid villus
specialized organ that helps expunge extra CSF to maintain hemeostasis and keep system from becoming too pressurixes
what does arachnoid villus look like in gross
granules
pia mater
continues very closes along entire surface of brain
lateral ventricles
C-shaped course through all the lobes of the cerebral hemispheres
what are teh components of the lateral ventricle
frontal/anterior horn body occipital/posterior horn atrium temporal horn
interventricular foramen of monro
drains into thrid ventrical
how does CSF drain
through interventricular forman of monro to 3rd ventricle to cerebral aqueduct to 4th ventricle to surfaces around the rain
where is 3rd ventricle located
midline region of diencephalon
where is 4th ventricle located
snwached between cerebllum and pons
cerebral aqueduct
narrowest component of 3rd ventricle
what can cause a blocked at the cerebral aquaduct
choroid plexus
choroid plexus
highly convoluted and vascular membranous material that produces and secretes CSF
function of CSF
supportive
control of extracellular fluid
provide route for neuoactive hormones
should you have RBCs in the CSF
NOPE
where is choroid plexus found
in all ventricles
blood brain barrier
anatomical and physiologial complex that controls movement of substances from general extracellular fluid of body to the extracellular fluid
structure of blood brain barrier
blood-arachnoid layer
blood - CSF barrier
true blood brain barrier
what are the initial barrier in BBB
tight junctions
where is the true blood brain barrier
glial level
