Vascular Anatomy of the Brain Flashcards
Anterior Circulation
Supplies the cerebral hemispheres
Cerebral Arteries
Anterior circulation - Internal Carotid Artery
Posterior circulation - Basilar Artery
T or F
ICA pass through the foramen lacerum
False
Pass above/over
Opthalmic Artery
In 15 or 50% of population, it arises from the cavernous sinus..not always supraclinoid
Terminal ICA’s branches
Posterior communicating artery
Anterior choroidal artery
ICA’s path
Cervical Petrous Lacerum Cavernous Clinoid Supraclinoid (Opthalmic) Terminal (2 branches)
True or False
When the opthalmic artery is lacerated, the patient will go blind
False
There are other arteries which supply blood to the eyes
Anatomosis of vessels
Impact of small arteries are great!!!
Small artery stroke similar to big artery stroke
Middle cerebral artery
Supplies majority of the part in one hemisphere
Supply the occipital lobe (not only posterior cerebral artery)
Signals the terminus of the ICA
Know!
Posterior circulation
During development, it develops earlier
Vertebral artery
Supplies the whole brain
Arises from the subclavian artery
Know!
Walenberg’s syndrome
ARAS
Supplied by perforating arteries
Starts from rostral pons to diencephalon
Circle of Willis
Whole circle is only present in 20-25%
Aneurysms
Common in Anterior Cerebral Artery
85% will happen in anterior circulation
15% happens in posterior circulation
Largest venous sinus
Runs smooth in the midline along the falx cerebri and extends posteriorly to the torcula of Herophili
Superior sagittal sinus
Center of gravity of the brain
Pineal region
Dominant venous drainage
Right transverse vein
Lacerated ICA
Build-up of pressure in cavernous sinus
Results to pulsating face, red face and red eye because the veins are engorged and won’t drain
