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CNS Vasculature - Anatomy & Physiology (view source)
Revision as of 17:43, 5 March 2011
, 17:43, 5 March 2011→Dog and Man (and many other species)
===Dog and Man (and many other species)===
===Dog and Man (and many other species)===
[[Image:Calfvssheepblood.jpg|thumb|right|150px|Calf vs Sheep blood supply comparism. RVC 2008]]
[[Image:Calfvssheepblood.jpg|thumb|right|150px|Calf vs Sheep blood supply comparism. RVC 2008]]
The circle of Willis in the dog is supplied from three sources; paired internal carotid arteries laterally and the basilar artery caudally. The internal carotid artery is a terminal branch of the common carotid artery.
Channels 1 and 2 supply the arterial circle. Neither channel has a [[#Rete_Mirable|rete mirable]]. The internal carotid artery blood reaches all of the cerebral hemisphere except for it's most caudal part. Vertebral blood supplies the the remainder of the cerebral hemisphere and the rest of the brain.
Channels 1 and 2 supply the arterial circle. Neither channel has a [[#Rete_Mirable|rete mirable]]. The internal carotid artery blood reaches all of the cerebral hemisphere except for it's most caudal part. Vertebral blood supplies the the remainder of the cerebral hemisphere and the rest of the brain.
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===Sheep and Cat===
===Sheep and Cat===
Only channel 3 supplies the arterial circle and unlike in the dog, this channel has a rete mirable. Channel 2 carries blood away from the arterial circle. Maxillary blood is distributed to all of the brain except the caudal part of medulla oblongata, which is supplied by vertibral blood.
Only channel 3 supplies the arterial circle and unlike in the dog, this channel has a rete mirable. Channel 2 carries blood away from the arterial circle. Maxillary blood is distributed to all of the brain except the caudal part of medulla oblongata, which is supplied by vertibral blood.