Session 2: Meningeal Layers, Dural Folds And Venous Sinuses Flashcards
What are the layers of the meninges (outermost to innermost)?
Dura
Arachnoid
Pia
Where is CSF found?
In the subarachnoid space
What two layers make up the dura?
Periosteal
Meningeal
How would you describe the arachnoid layer?
A soft translucent membrane
What do dural folds act to do?
Help to stabilise the brain and act as rigid dividers
Name the two main dural folds
Falx Cerebri
Tentorium Cerebelli
What vessel do the dural venous sinuses drain into?
Internal jugular vein
What is the purpose of bridging veins?
To connect cerebral veins from the sinuses to those in the subarachnoid space
Where is the cavernous sinus?
Either side of the sella turcica
Which sinus makes the origin of the internal jugular vein?
Sigmoid sinus
What is a dural venous sinus?
Venous blood filled space where there is separation of dural layers
In which plane is the Falx Cerebri?
Saggital
What is the anterior attachment of the Falx Cerebri?
Crista galli
What two compartments of the cranial cavity does the tentorium cerebelli form?
Supratentorial and infratentorial compartments
Which of the meningeal layers is avascular?
Arachnoid mater
