Blood Supply - CNS Flashcards
Requirement in terms of Cardiac output
10/20%
Highly metabollic organ of the body
Brain
consumes what % of body’s oxygen consumption
20%
brain consumes what % of liver’s glucose production
66%
Blood flow concentrated to those that needed it more
Diving reflex
What is usually depleted of blood supply
Kidneys
Internal Carotid artery enters cranial cavity through
Carotid canal at the floor of middle cranial fossa
ICA passes through the cavernous sinus _________ to Sella Turcica
Lateral
ICA bends upward into the cranial cavity medial to _______
Anterior Clinoid Process
Different turns constitute the
CAROTID SIPHON
S shaped portion of ICA
Carotid Siphon
MAJOR BRACHES OF ICA
"HOPAMA" Hypophyseal A Opthalmic A Posterior Communicating A Anterior Choroidal A Middle Cerebral A Anterior Cerebral A
Supply pituitary gland and branches as superior hypophyseal and inferior hypophyseal
Hypophyseal A
Arises as ICA emerges into the cavernous sinus and supplies eye and orbital contents
Opthalmic A
Branch of Opthalmic a
Central Retinal A (CRA)
Serves as connection b/w ICA to vertebral artery system and connects ICA to Posterior Cerebral artery
Posterior Communicating A
Choroid plexus in inferior horn of lateral ventricle as well as internal capsule, caudate nucleus, putamen and basal ganglia
Anterior Choroidal A
Direct continuation of ICA that passes laterally to Sylvian Fissure supplying dorsolateral surface of cerebral hemispheres
Middle Cerebral A
Initial segment of MCA
M1
Initial segment of MCA will give off
lateral arteries of MCA
lateral arteries of MCA + Medial arteries of ACA
Lenticulostriate Arteries
