Meningeal Anatomy, Dural Folds And Dural Venous Sinuses Flashcards
What are the layers of the meninges surrounding the brain?
Pia mater
Arachnoid mater
Dural mater (meningeal and periosteal layers)
What is the space between the pia mater and arachnoid mater called? What is found within this space?
Sub-arachnoid space. It is filled with CSF and cerebral arteries and veins
Which of the meningeal layers follows the brains contours?
Pia mater
Which of the meningeal layers can be seen and distinguished with the naked eye?
The arachnoid mater and dura mater
What are the contours of the brain known as?
Gyri and sulci
What is the dural fold called that is found within in the longitudinal fissure?
Falx cerebri
What is the falx cerebri attached to anteriorly?
Crista Galli
What is the horizontal dural fold called that acts to separate the middle and posterior fossae?
Tentorium cerebelli
What is the space between the tentorium cerebelli that allows space for the middle brain?
Tentorial notch
What are the functions of the dural folds?
The helps to stabilise the brain by acting as rigid dividers
Where are venous sinuses found?
At the area where dural folds are closest to the bone?
What are venous sinuses?
Spaces formed by the separation of the two dural layers where venous blood drains
Which veins pass from the sub-arachnoid space into dural venous sinuses?
Bridging veins
What are the veins called that travel from the dense connective tissue of the scalp into dural venous sinuses?
Emissary veins
What are the venous sinuses found in the falx cerebri?
Superior and inferior saggital sinuses
What is the named of the dural venous sinus in the tentorium cerebelli?
The transverse sinus
What is the name of the dural venous sinus connecting the transverse sinus and the inferior saggital sinus?
The straight sinus
What is the S-shaped dural venous sinus which drains venous blood from the other sinuses into the internal jugular vein?
Sigmoid sinus
What is the dural venous sinus on the cranial floor (containing the carotid siphon of ICA and cranial nerves 3,4,5) and the two pairs of other sinuses which exit it?
Cavernous sinus and the superior and inferior petrosal sinuses
Which foramina located in the middle cranial fossa allows passage of the middle meningeal artery?
Foramen spinosum
