Flashcards in Cerebrovasculature Deck (27):
Arises from the common carotid
Branch of internal carotid.
Supplies the retina, and cranial dura.
Occlusion: Loss of vision in ipsilateral eye
Posterior Communicating Artery
Arises at level of optic chiasm.
Supplies optic chiasm, optic tract, hypothalamus, thalamus, and mammillary bodies.
Occlusion: Alteration in visual processing, Alter Parasympathetic/sympathetic NS. Alter sensory/ motor processing, difficulty forming new memories.
Anterior Choroidal Artery
Supplies choroid plexus in inferior horn of lateral ventricle, the optic tract, portions of the thalamus, and portions of the midbrain.
*Hippocampus lies inferior to anterior choroidal*
Occlusion: Loss of new memory formation.
Anterior Cerebral Artery (ACA)
Travels through medial longitudinal fissure.
Supplies medial/superior aspect of frontal/parietal lobes, all of corpus callosum (except splenium), cingulate gyrus/sulcus, precuneus, and paracentral lobule.
Lies along superior surface of corpus callosum
Occlusion: Loss of motor/sensory areas supplied by ACA
Anterior Communicating Artery
Connects the anterior cerebral arteries
Supplies, portions of fornix, optic chiasm, hypothalamus, and portions of the cingulate gyrus.
-Intercranial aneurysms commonly occur (20-25% incidence) within the anterior communicating, or at junction where it branches off ACA
Middle Cerebral Artery (MCA)
Large vascular territory. Supplies lateral convexity of the cerebral hemisphere, , including parts of temporal, parietal, frontal, and occipital.
Occlusion: would produce the most CS&S, but will often only effect specific branches.
Supplies parts of the medulla.
Anterior Spinal Artery
Supplies portions of the spinal cord, medulla, olives, and pyramids.
Occlusion: loss in voluntary motor movement, inability to process auditory stimuli, change in respiration and cardiac function.
Posterior Inferior Cerebellar Artery (PICA)
Supplies portions of the medulla, cerebellum, and olive.
Occlusion: changes in respiratory/cardiac function, changes in balance/posture, loss or decrease in auditory function.
Posterior Spinal Artery
Supplies parts of the medulla, and the spinal cord.
Arises from Vertebral A. in 25% of pop.
Arises from PICA in 75% of pop.
CS&S may vary based on origination.
Anterior Inferior Cerebellar Artery (AICA)
Supplies cerebellum and pons.
Occlusion: loss off coordination/balance.
Loss of motor/sensory for the face.
Posterior Cerebral Artery (PCA)
Supplies portions of midbrain, thalamus, temporal lobe, medial/inferior occipital lobe.
Occlusion: loss of vision, inability to recognize faces.
Superior Cerebellar Artery
Supplies rostral level of pons, caudal part of midbrain, and superior surface of midbrain.
Occlusion: loss of motor/sensory to left side of face.
Supplies primary visual cortex (Brodmann's 17)
Cerebral Arterial Circle
Circle of willis.
Funcional in only 20% of pop.
Superior Sagittal Sinus
Runs along superior border of falx cerebri.
Drains into confluence.
Point where CFS enters bloodstream.
Inferior Sagittal Sinus
Inferior border of falx cerebri.
Great cerebral vein of of Galen, joins to form straight sinus.
Straight sinus empties into confluence.
Originates on either side of confluence, travels laterally/rostrally, curves to form sigmoids sinus, sigmoids empties into jugular.
Confluence of Sinuses
Superior, straight, and occipital sinuses join to form confluence.
located on either side of sphenoid. Opthalmic/middle cerebral veins drain into sinus.
Superficial Middle Cerebral Vein
Runs along lateral sulcus
Drains temporal lobe (especcially superior/middle gyrus)
Empties into cavernous sinus.
Superior Anastomotic Vein of Trolard
Largest superficial vein.
Travels across parietal.
Drains into superior sagittal sinus.
Connects superficial middle cerebral vein with superior sagittal sinus.
Inferior Anasmotic Vein of Labbe
Connects superficial middle v. w/ transverse sinus.
Largest vein draining transverse sinus.
Travels across temporal lobe.
Great Cerebral Vein of Galen
Formed by union of 2 internal cerebral v's at level of splenium & basal vein of rosenthal.
Drains into inferior sagittal sinus & straight sinus.
The cerebellum/medulla are drained by a network of v's that empty into great cerebral v of Galen in addition to other sinuses.
Basal Vein of Rosenthal
Drains blood from orbital surface of frontal lobe, andterior portions of corpus callosum, rostral parts of cingulate gyrus, and the insula.
Empties into great cerebral vein of galen.