BBB, arterial blood supply, venous drainage Flashcards
What structures lie in the subarachnoid space?
Arteries
What does the pia mater act as a barrier between at the level of capillary network?
barrier between blood vessels and neurological tissue
What 2 pairs of vessels supply the skull?
Vertebral arteries
internal carotid arteries
What % does the vertebral arteries supply?
20%
What % does the internal carotid arteries supply?
80%
What arteries arise at the bifurcation of the common carotid?
Internal carotid arteries
What artery does the internal carotid arteries arise from?
Common carotid
At what level does the common carotid artery bifurcate to form the internal carotid arteries?
At the upper border of the thyroid cartilage
Where does the internal carotid artery enter once ascended through the base of the skull?
The temporal bone
Where does the internal carotid artery lie once entered into the temporal bone?
The carotid canal
What does the internal carotid artery had pierced the dura what does it form?
Roof of the cavernous sinus
What structure forms the roof of the cavernous sinus?
The internal carotid artery
What terminal branches does the internal carotid artery divide into?
anterior and middle cerebral arteries
What does the anterior cerebral arteries supply?
Corpus callosum and the medial aspects of the hemispheres
Which terminal branch of the internal carotid artery is the largest?
Middle cerebral artery
Which artery supplies majority of the lateral surface of the hemispheres?
Middle cerebral artery
What is the name of the artery that connects the 2 anterior cerebral arteries?
Anterior communicating arteries
What artery does does the vertebral arteries arise from?
The subclavian artery
Where does the vertebral artery enter the skull?
The foramen magnum
What artery is formed when the 2 vertebral arteries unite?
The basilar artery
Where do the 2 vertebral arteries unite?
Lower border of the pons
What artery lies in the anterior median fissure?
Basilar artery
Where do cerebral arteries first drain into?
the dural venous sinuses
What does the dural venous sinus connect?
Major cerebral veins to the internal jugular veins
What are the two types of cerebral veins?
The internal cerebral veins
The external cerebral vein
Which type of cerebral veins run within the substance of brain tissue?
Internal cerebral veins
Which type of cerebral veins run on the surface of the brain crossing the subarachnoid space?
The external cerebral veins
Where can the cavernous sinus be located?
beside the body of the sphenoid bone
Which sinus contains 5 cranial nerves
Cavernous sinus
What does the cavernous sinus contain?
5 cranial nerves
internal carotid artery
What gets drained into the cavernous sinus?
Blood from the face, upper teeth and nasal sinuses
What are the 5 cranial nerves housed by the cavernous sinus?
Oculomotor Trochlear Opthalmic Trigeminal Abducens
Which sinus can cause spread of infection to the brain?
Cavernous sinus
