Meningeal Layers Flashcards
Name the three meningeal layers from superficial to deep
Dura mater, arachnoid mater, pia mater
What is the name of the dural fold that runs through the longitudinal fissure?
Falx cerebri
Blood from the superior sagittal and inferior sagittal sinuses will drain into what common point?
Confluence of the sinuses.
This then drains into the transverse sinus
What sinus connects the cavernous sinus to the sigmoid sinus?
Inferior Petrosal sinus
What sinus connects the cavernous sinus to the transverse sinus?
Superior petrosal sinus
Which veins do dural venous sinuses drain into?
Internal jugular veins
What connects the veins of the scalp to the dural venous sinuses? What is the clinical relevance?
Emissary veins.
These provide a pathway for infection to spread to intracranial structures
What structures connect cerebral veins to dural venous sinuses?
What haemorrhage would be likely to occur if these were damaged?
Bridging veins
Subdural haemorrhage
Where is extradural haemorrhage often found?
After trauma to the pterion, causing bleeding between the periosteal layer and inner table from middle meningeal artery
How can you test for a subarachnoid haemorrhage?
What other method would you use if this was inconclusive?
CT head
Lumbar puncture searching for haemoglobin degredation products
What treatment is used for intracranial haemorrhage?
Craniotomy and evacuation of blood
What differs between subdural and extradural haemorrhage?
Think about shape and signs
Extradural are often biconvex while subdural are crescent shaped
Extradural often have a lucid period followed by sharp decline
Subdural often have strong headache with gradual decline
