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CNS Vasculature - Anatomy & Physiology (view source)
Revision as of 13:09, 6 March 2011
, 13:09, 6 March 2011→Dog and Man (and many other species)
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. 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. Vertebral arteries are responsible for almost all supply to the occipital lobes of the cerebral hemisphere in the dog.
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. 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. Vertebral arteries are responsible for almost all supply to the occipital lobes of the cerebral hemisphere in the dog.
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On the right side of the brain in canines and humans, the internal carotid also receives a blood supply via two other sources. Firstly from the ramus of the vertebral artery (bypassing the occipital artery) and secondly from the maxillary ramus (bypassing the external carotid artery). Both of these rami appear to have a rete mirabile function prior to connecting to the internal carotid artery. On the left side of the brain in canines and humans there are no rami interconnecting between the main supply channels.
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