Meninges Flashcards
A cut through what layer in the scalp would result in a gaping wound?
Aponerosis
What layer of scalp does infection spread through?
Loose connective
What are the two layers of the Dura?
- Periosteal
- fused to bone
- Meningeal
What layer of Dura forms sinuses?
meningeal
Where does the middle meningeal artery sit?
- In between two layers of the dura
What layer of dura continues into the spinal cord?
meningeal
What part of the arachnoid matter gives structure to subarachnoid space and make it a real space?
Arachnoid trabeculae
Whar part of arachnoid transverses the meningeal dura into dural venous sinuses?
- continues as arachnoid into venous system and allows for drainage into venous from CSF
- Arachnoid granulations
What layer of the meninges is adherent to the brain and highly vascularized?
- you cant really pick it out
Pia
What dural partition seperates the right and left cerebral hemispheres?
- largest infolding
- in the longitudinal cerebral fissure
Falx Cerebri

What dural partition seperates cerebrum from cerebellum?
- 2nd largest
- falx cerebri attaches to this and help to hold it up
Tentorium Cerebelli

What dural partition seperates right and left cerebellum?
Falx cerebelli

What dural partition is an opening for infundibulum?
- makes house for pituitary to sit on
Diaphragma sellae

What do the dural venous sinuses drain?
- Dipolic veins
- emissary veins
- CSF
- all of these are drained into internal jugular vein via the venous sinuses
What dural venous sinus drains into the internal jugular vein?
Sigmoid
What drains the cavernous sinus?
Superior petrosal and inferior petrosal
Where is the CSF made?
Choroid plexus of the ventricles
What is hyrdocephalus?
- overproduction of CSF, obstruction of CSF flow, or interferance with CSF absorption results in excess fluid in the cerebral ventricles and enlargement of the head
- obstruction usually occurs in the cerebral aquaduct
- water on the brain
Arteries of the Dura supply more blood to what?
- Calavria (bone) than dura
Is the epidural space in brain a real space or potential space?
- between cranium and periosteal layer
Potential
- shouldnt be there
Is the subdural space in brain a real space or potential space?
- dural-arachnoid interface
- between dura and aracnoid
Potential space
- shouldnt be there
Is the subarachnoid space in brain a real space or potential space?
- between arachnoid and pia
- real space-should be there
- contains CSF, arteries (circle of willis) and veins
- arachnoid tubercle give structure to this space
Is the subpial space in brain a real space or potential space?
- between pia and cortex of brain
- potential space-shouldnt be there
What is this hematoma:
- bleeding: between cranium and periosteal dura
- source: usually middle meningeal artery
- common site: fracture of squamous temporal bone or pterion
Epidural hematoma