1.5 The Blood Supply to the Nervous System Flashcards
What is the Circle of Willis?
This is a Circle of anastomosing Arteries which supplies blood to the Brain
What are the 3 Arteries which Supply blood to the Circle of Willis?
- The Left Internal Carotid Artery
- The Right Internal Carotid Artery
- The Basilar Artery
Where do the Internal Carotid Arteries arise from?
The Common Carotid Arteries
Where does the Basilar Artery arise from?
The anastomosing of the 2 (Left and Right) Vertebral Arteries
Where do the Vertebral Arteries anastomose to form the Basilar Artery?
At the Pontomedullary Junction (Over the Brainstem) and these then run the length of the Pons
Where do the Vertebral Arteries arise from?
The Subclavian Arteries
Which Arteries completes the posterior Circle of Willis by linking the Internal Carotid Arteries and the Basilar Artery?
The Posterior Communicating Arteries
Which Arteries completes the anterior Circle of Willis by linking the Anterior Cerebral Arteries?
The Anterior Communicating Artery
What Artery, supplying part of the Head, leaves the Internal Carotid Artery before it reaches the Circle of Willis?
The Ophthalmic Artery
What Artery, supplying the Spine, leaves the Vertebral Arteries before they anastomose to form the Basilar Artery
The Posterior Spinal Artery
What Artery, supplying part of the Brain, leaves the Vertebral Arteries before they anastomose to form the Basilar Artery
The Posterior Inferior Cerebellar Artery
Which 3 Arteries, supplying part of the the Brain, leaves the Basilar Artery before it reaches the Circle of Willis?
(Distal to Proximal in relation to the Circle of Willis)
- The Anterior Inferior Cerebellar Artery
- The Layrinthine Artery
- The Superior Cerebellar Artery
What are the 3 pairs of Cerebral Arteries which arise from the Circle of Willis?
- The Anterior Cerebral Artery
- The Middle Cerebral Artery
- The Posterior Cerebral Artery
What area does the Anterior Cerebral Artery supply?
The Median Surface of the Cerebrum, and the superior part of the Superficial Surface of the Cerebrum
What area does the Middle Cerebral Artery supply?
The Anterior Superficial Surface of the Cerebrum, except for the superior part