Trans - Meninges and CSF Pathways Flashcards
meninges - define
connective tissue wrappings of CNS
pachymeninges - components
dura and arachnoid
Leptomeninges - components
pia and arachnoid
2 layers of dura mater
- outer periosteal
2. inner meningeal
which layer of the dura has blood vessels and nerves?
outer periosteal
2 potential spaces within dura
- epidural space
2. subdural space
epidural hematoma will follow the contour of what structure
skull
subdural hematoma will follow the contour of what structure
brain
[T/F] the subarachnoid space is an actual space
T
what is contained in the subarachnoid space
CSF and blood vessels
falx cerebri lies in what structure
median sagittal fissure
falx cerebri - anterior attachment
crista galli
falx cerebri - posterior attachment
tentorium cerebelli
what separates the hemispheres of the cerebellum
falx cerebelli
what separates the cerebellum from the cerebrum
tentorium cerebelli
dural projection lying over sella turcia
diaphragma sellae
what structure projects through the diaphragma sellae
infundibulum
another name for confluence of sinuses
torcular Herophili
what sinuses converge in confluence of sinuses
- superior sagittal sinus
- left transverse sinus
- right transverse sinus
- straight sinus
sigmoid sinus drains into what structure
jugular bulb
biggest blood vessel in dura
middle meningeal artery
middle meningeal artery is a branch of:
internal maxillary artery (os204 yehey)
anterior meningeal arteries are branches of:
opthalmic artery
posterior meningeal arteries are branches of
occipital or vertebral arteries
innervation of dura in anterior and middle cranial fossa
trigeminal nerve
innervation of dura in posterior cranial fossa
C2/C3, vagus
spinal dura mater forms a tube from where to where
foramen magnum to S2
spinal dura mater forms which structure at the end of the spinal cord
coccygeal ligament
epidural space of the spinal dura mater is largest above which vertebra
L2
[T/F] spinal epidural space is a potential space
F
difference of spinal and cranial epidural spaces
cranial epidural spaces is between periosteum and cranium
spinal epidural space is between dura and periosteum
what is the biggest cisterna
cisterna magna / cerebellomedullary cisterna
where is the interpeduncular cisterna located
in the interpeduncular fossa
what subarachnoid cisterna is associated with the superior and inferior colliculi
quadrigeminal cisterna
what subarachnoid cisterna is associated with the thalamus
ambient cisterna
function of arachnoid villi/granulations
absorb CSF back into venous system
cells associated with arachnoid villi / granulations
leptomeningeal cells
Virchow-Robin perivascular space - define
enclosed space associated with pia mater, following vessels of the brain up to the capillary level
cuff around brain blood vessels
intima pia
filum terminale anchors what structures
anchors conus medullaris (caudal end of spinal cord) to caudal end of spinal dural sheath
projections of pia mater in spinal cord which go through the arachnoid to interface with the dura
denticulate ligaments
ventricles are lined by what cells
ependymal cells
choroid plexus - function
filter plasma to create CSF
rate of creation of CSF
500 ml/day
normal amount of CSF in ventricular system and subarachnoid space
100-160ml
blood brain barrier - function
protects brain from infection
type of junction in blood brain barrier
tight junction
what substances does the blood brain barrier let pass?
nutrients, O2, CO2
the blood brain barrier is not a barrier against what substances
- uncharged molecules
- lipid soluble molecules
- nicotine and alcohol
- some anaesthetics
lateral ventricles follow contour of what structure
caudate nucleus
parts of lateral ventricle
- frontal horn
- temporal horn
- occipital horn
- atrium
another name for atrium of lateral ventricle
trigone
what structure separates the left and right sides of the lateral ventricle? in what specific part of the ventricle is this found?
septum pellucidum in frontal horn
how does the lateral ventricle communicate with the 3rd ventricle
foramen of Monro
how does the 3rd ventricle communicate with the 4th ventricle
cerebral aqueduct / aqueduct of Sylvius
structures immediately anterior to the 4th ventricle
pons and medulla
structures immediately posterior to the 4th ventricle
cerebellum
the 4th ventricle floor has pubs for which cranial nerves
7, 9
how does the 4th ventricle communicate with the subarachnoid space
- one foramen of Magendie
2. two foramina of Luschka
which of the 4th ventricle foramina is more lateral?
foramen of Luschka
which of the 4th ventricle foramina is more medial
foramen of Magendie
