Meninges Flashcards
Where do you take a pulse
At the bifurcation of the carotid and medial tot he sternocleidomastoid
What veins form the superior vena cava
Subclavian+internal jugular=brachiocephalic
Brachichephalic+brachicephalic=superior vena cava
Where does the internal carotid artery pass through s it maes its turn and what is the turn called
The carotid siphon and it passes through the cavernous sinus
Where does the internal carotid artery enter the skull
The carotid canal and the foramen lacerum
Where does the vertebral artery enter the skull
The foramen magnum
What is the inner folding of the dura called that contains makes up the boundaries to the venous sinus
The falx cerebri
Falx cerebri definition
Sickle shaped between the two hemispheres; attached anteriorly tot he crista galli of the ethmoid and posteriorly it blends into the tentorium cerebelli
Falx cerebelli definition
Smaller extension between cerebellar hemispheres along the posterior wall of the cranium
Tentorium cerebelli definition
Forms the roof of the posterior cranial fossa
Diaphragms sella
Fold over the sella turcica
Tentorial notch
Opening for the brainstem
Superior Sagittarius sinus location and what veins feed it
Upper border of falx cerebri and blood from the superior cerebral veins through bridging veins11!!!
Inferior Sagittarius sinus location
Lower border of the falx cerebri, joins the great cerebral vein, and forms the straight sinus
Straight sinus location
At the junction of the falx cerebri and the tentorium. Can join the superior Sagittarius sinus at the confluens of sinuses
Transverse and sigmoid sinuses
Yea
Cavernous sinuses locations and clinical relavence
In the middle of the cranial fossa, nd connected by the intercavernous sinuses. They receive blood from the superior and inferior ophthalmic veins and drain to the superior and inferior Petrosal sinuses
Infection can spread from the face to the cavernous sinus via anastomoses of the ophthalmic veins and facial veins
What do the superior and inferior Petrozavodsk sinuses drain to
The internal jugular
What structures pass through the wall of the cavernous sinus
Clinical correlation
Internal carotid artery, CN 3,4,V1,V2,6.
Infection sign is blurred vision
Where is CSF made and where does it flow out
The choroid plexus and it flows our of the brain to the subarachnoid space
Where is CSF reabsorbed and what is the clinical correlation
It re absorbs into the venous sinuses at the arachnoid vili which can become calcified, which reduces reabsorption and can produce communicating hydrochephalus
Epidural hematoma definition and arteries that are typically affected
Bleeding between the dura and the bone
Middle meningeal artery
Epidural hematoma
How does it typically occur
What does it do
Clinical presentation
Occurs from a skull fracture at the pterion
The fracture causes a tear in the middle meninges like artery which builds pressure and pees the dura from the bone
Clinically presents as a bioconversion mass on the CT and the patient is lucid at first and can be fatal within hours
What are the herniations called as the result of a hematoma
Uncalled herniation-pushed temporal lobe through the tentorial notch
Tonsillar herniation-push the cerebellum through the foramen magnum
Subdural hematoma definition
Bleeding into space between dura and the arachnoid and can remain undetected
