Meninges Flashcards
The external periosteal layer of the dura is continuous with the dura mater of the spinal cord. True or false? If false, explain.
False.
The dura of the spinal cord is continuous only with the meningeal layer of the dura covering the brain.
In the craniual base, the two dural layers can be easily separated from the bones. True or false? If false, explain.
False.
The dura is firmly attached to the cranial base and is difficult to separate from the bones.
What are the meninges of the brain?
Dura mater, arachnoid mater, pia mater
The arachnoid is avascular. True or false? If false, explain.
True
Which meninge adheres closely to the brain, following its folds?
Pia mater
Which are potential spaces inside the normal skull between the meninges?
Epidural space/ extradural space/ dura-cranial interaface &
Subdural space/dura-arachnoid junction
Which is a real space between the meninges?
Subarachnoid space/arachnoid-pia interface
Which is the potential space located between the dura mater and arachnoid?
Subdural space/dura-arachnoid junction
Which is the potential space between the cranium and the dura?
Epidural space/ extradural space/ dura-arachnoid interface
Which is the space between the arachnoid and pia mater?
Subarachnoid space/arachnoid-pia interface
What fluid fills the subarachnoid space?
CSF
Which structures are the sited of diffusion of CSF into the blood stream?
Arachnoid villi
What are arachnoid granules?
Aggregations of arachnoid villi
What are the two layers of the dura?
Periosteal layer/ endosteal layer &
Meningeal layer
What is the falx cerebri?
The dural infolding found in the longitudinal fissure, separating the right and left hemisphere
What does the falx cerebelli separate?
Cerebellar hemisphere
Which dural reflection separates the occipital lobes of the cerebral cortex and the cerebellum?
Tentorium cerebelli
The tentorium cerebelli divides the cranial cavity into which compartments?
Supratentorial compartment, infratentorial compartment
Which is the smallest dural reflection?
Diaphragma sella
Which is the largest dural reflection?
Falx cerebri
What structure does the diaphragma sella roof over?
Sella turcia
Which layer forms the dural reflections?
Meningeal layer
Where does the falx cerebri attach to anteriorly?
Frontal crest of the frontal bone, crista galli of ethmoid bone
Where does the falx cerabri attach to posteriorly?
Internal occipital protruberance
The falx cerabri is continous with the tentorium cerebelli. True or false? If false, explain.
True.
The tentorium cerebelli attaches to which structure rostolaterally?
Petrous portion of the temporal bone
Tentorium berebelli attaches to which structure rostrally?
Clinoid process of the sphenoid
The tentorium cerebelli attaches to which structure posterolaterally?
Occipital and parietal bones
Through which structure of the tentorium cerebelli does the midbrain pass?
Tentorial notch
What are the leptomeninges?
Arachnoid mater, pia mater
What are pachymeninges?
Dura mater, arachnoid mater
Supratentorial structures except:
a. superior colliculus
b. thalamus
c. lateral geniculate body
d. medial geniculate body
A
Which layer is intimately related to the brain parenchyma
a. outer dura
b. inner dura
c. arachnoid
d. pia mater
D
