Brain & Meninges (Part 2) Flashcards
what layers the dural venous sinus
endothelium
where is the dural venous sinus located
between the periosteal and meningeal dural folds
what does the dural vebous sinus drain
all crainal contents via the internal jugular
where does the dvs collect venous blood from
cerebral vv. cerebellar vv. vv. draining the brain stem diploic vv. emissary vv
dvs unpaired vs paired
unpaired:
paired:
dvs unpaired vs paired
unpaired:
1. S sagittal
2. I sagittal
3. straight
4. occipital
5. A inter
paired:
- transverse
- sigmoid
where does the SSS begin
crista galli of the ethmoid bone
where does the SSS terminate
confluence of sinuses
where does SSS lie
convex attached border of the falx cerebru
what does the SSS recieve
superior cerebral vv.
what is the drainage site of CSF via arachnoid granulations
SSS
what is the smaller SS
inferior SS is much smaller than SSS
where does the ISS run
runs in the inferior concave free border of the falx cerebri
where does the ISS end
at the straight sinus
where does the occipital sinus lies
in the attached border of the falx cerebelli
where does the OS end
confleucne of sinuses
confluence sinuses
dialted space at internal occipital protriberance
confluence sinuses tributaries
superior sagittal
straight
occipital
transverese sinus: paired or unpaired?
paired
transverse sinus passes were
laterally from confluence of sinuses
transverse sinus forms a groove in whar bone
occipital
sigmoid sinus: paried or up
p
sigmoid sinus: continuation of what sinus
transverse sinus
what does the sigmoid sinus form
deep s shaped groove in temporal and occipital bones
sigmoid sinus drains through
internal jugular vein
cavernous sinus* is situated where
middle cranial fossa on either side of the body of the sphenoid
cavernous sinus*
pool stagnant blood contained by dural folds
cavernous sinus* is situated where
middle cranial fossa on either side of the body of the sphenoid
A boundary: S orbital fissure
P boundary: apex of petrous temporal bone
cavernous sinus*
pool stagnant blood contained by dural folds
- doesnt drain as well
cavernous sinus* connected by
A and P intercavernous sinuses
cavernous sinus* recieves blood
tributaries
- cerebral vv.
- superior and inferior opthalamic vv. (picture)
- intracraninal
cavernous sinus* drains into
- superior and inferior petrosal sinuses
- basilar sinus (plexes)
- sometimes can drain into the pterygoid sinuses via emissary
superior petrosal sinus lies were
in antero-lateral margin of tentorium
superior petrosal sinus drains into
transverse sinus
where does the inferior petrosal sinus run
groove between petrous portion of the temporal bone and basilar part of occipital bone
inferior petrosal sinus drains
into junction between sigmoid sinus and internal jugular v.
