Anatomy 4: Space Occupying Lesions Flashcards
Name the 5 layers of the SCALP?
Skin Connective tissue Aponeurosis Loose connective tissue Pericranium
What makes up the “scalp proper”?
Skin
Connective tissue
Aponeurosis
Which layer of the scalp are the arteries found?
Connective tissue layer
What is the pterion?
H shaped suture at junction of frontal, parietal, temporal and sphenoid bones
Why is the pterion clinically important?
(One of) thinnest point of skull
Middle meningeal artery directly deep to pterion
Dura mater is largely supplied by? (sensory)
CN V
Name the layers of the dura mater
Periosteal
Meningeal
What is an arachnoid granulation?
Projection of the arachnoid membrane into the dural sinuses that allow CSF to drain into the venous system
What are the folds of the dura mater called?
Septae
What is the name of the dura mater septum that forms a roof over the pituitary fossa?
Diaphragm sellae
What is the name of the dura mater septum that forms a tent over the cerebellum?
Tentorium cerebelli
What is the name of the midline structure formed by the dura mater?
Falx cerebri
Which septum attaches to the ridges of the petrous temporal bones?
Tentorium cerebelli
The falx cerebri attaches to?
Anteriorly: crista galli of ethmoid bone
Superiorly: Internal aspect of sagittal suture
Posteriorly: Internal occipital protuberance
The two layers of the dura can split to form vein-like structures, what are they called?
Dural venous sinuses
What venous landmark is found at the internal occipital protuberance?
Confluence of sinuses
Which two (pairs) of arteries supply the circle of willis?
Vertebral arteries
Internal carotids
In the COW the two vertebral arteries meet to form the?
Basilar artery
Trauma to the pteryion can cause what kind of bleeding?
Extradural
Which type of bleed within the cranal cavity is associated with elderly patients falling?
Subdural
What can cause a subarachnoid haemorrhage?
Berry anuerysm
Ruptured COW
Congenital anuerysm
