Lecture 4: Blood Supply Flashcards
What are the two main blood supplies to the brain?
•Internal Carotid
•Vertebral Basilar
What two main blood vessels does the Internal Carotid make?
•Middle Cerebral Artery (MCA)
•Anterior Cerebral Artery (ACA)
What main blood vessel does the Vertebral Basilar system make?
Posterior Cerebral Artery (PCA)
What are the two main blood vessels of the brain responsible for supplying?
•Internal Carotid - Anterior Circulation
•Vertebrobasilar System - Posterior Circulation
What does the External Carotid Artery supply?
The face, neck and middle meningeal artery
What does the Middle Meningeal artery arise from?
The External Carotid artery
What is the Anterior Part of the brain supplied by?
The Internal Carotid Artery
What is the Posterior Part of the brain supplied by?
The Vertebrobasilar system
What parts of the brain does the Internal Carotid Arterial System supply?
Frontal, Parietal and Temporal lobes
What parts of the brain does the Vertebrobasilar System supply?
Occipital lobe, cerebellum, brainstem, and upper cord
What blood system supplies the Frontal, Parietal and Temporal lobes?
Internal Carotid Arterial System
What blood system supplies the Occipital lobe, cerebellum, brainstem and upper cord?
Vertebro-basilar System
Where do the Internal Carotid Arterial System and the Vertebrobasilar System anastomose?
At the Circle of Willis
What is the Circle of Willis?
Where the Internal Carotid Arterial System and the Vertebro-basilar system anastomose at the base of the brain
What is the Circle of Willis composed of?
•Middle Cerebral Artery
•Posterior Communicating Artery
•Posterior Cerebral Artery
•Anterior Cerebral Artery
•Anterior Communicating Artery
What are the two beginning arteries of the Vertebro-basilar system?
The two Vertebral Arteries
What system are the Vertebral Arteries apart of?
The Vertebro-Basilar System
Describe the Vertebral Arteries?
•First paired arteries of the Vertebral Basilar system
•Protected by cervical vertebrae by vertebral foramen
•Climb up along with spinal cord to ventral surface of the medulla
What do the two Vertebral Arteries become?
They become the singular Basilar artery at the pontomedullary junction
Where do the two Vertebral Arteries become a singular artery?
They become the Basilar Artery at the Pontomedullary Junction
What branches off of the Vertebral Artery?
•Post Inferior Cerebellar Artery (PICA)
•Anterior Spinal Artery
Where does the Post Inferior Cerebellar Artery (PICA) come from?
It branches off of the Vertebral Artery
What does the Posterior Inferior Cerebellar Cerebellar Artery supply?
It supplies the posterior inferior part of the cerebellum
What supplies the posterior inferior part of the cerebellum?
The Posterior Inferior Cerebellar Artery
Where does the Anterior Spinal Artery come from?
It branches off of the Vertebral Artery
What does the Anterior Spinal Artery supply?
It supplies the anterior surface of the brainstem and spinal cord
What supplies the anterior surface of the brainstem and spinal cord?
The anterior spinal artery
What branches off of Posterior Inferior Cerebellar Artery (PICA)?
The Posterior Spinal Arteries
Where do the Posterior Spinal Arteries come from?
They branch off the Posterior Inferior Cerebellar Arteries (PICA)
What do the Posterior Spinal Arteries go?
They run the length of the dorsal spinal cord
What does the Posterior Spinal Artery Supply?
The Posterior Spinal Chord
What supplies the posterior spinal cord?
The Posterior Spinal Arteries
What Branches off of the Basilar Artery?**
•Anterior Inferior Cerebellar Artery (AICA)
•Pontine Arteries
•Superior Cerebellar Artery
Where does the Anterior Inferior Cerebellar Artery (AICA) come from?
It branches off the Basilar Artery
What does the Anterior Inferior Cerebellar Artery (AICA) supply?
The Anterior Inferior Cerebellum
What vessels supply the cerebellum?
•Posterior Inferior Cerebellar Artery (PICA)
•Anterior Inferior Cerebellar Artery (AICA)
•Superior Cerebellar Arteries
Where do the Pontine Arteries come from?
The Basilar Artery
What does the Pontine Artery supply?
The Pons
What supplies the Pons?
The Pontine Artery
What does the Superior Cerebellar Artery come from?
The Basilar Artery
What do the Superior Cerebellar Arteries supply?
The Superior part of the Cerebellum
What supplies the superior part of the Cerebellum?
The Superior Cerebellar Arteries
What does the Vertebral Basilar System supply?
•Spinal cord
•Brainstem
•Cerebellum
•Occipital lobe and underside of temporal lobe
What does the Posterior Cerebral Artery (PCA) Supply?
•Occipital lobe
•Undersurface of temporal lobe
What supplies the occipital lobe and the undersurface of the temporal lobe?
The Posterior Cerebral Artery (PCA)
Summary of the branching of the Vertebral-Basilar system:
•Vertebral arteries join together at the pontomedullary junction to create the basilar artery
•Post-inferior cerebellar artery (PICA) branches off of the vertebral arteries
•Posterior Spinal Arteries branch off the Posterior Inferior Cerebellar Arteries (PICA)
•Anterior Inferior Cerebellar Artery (AICA) branches off of Basilar Artery
•Superior Cerebellar Artery branches off of the Basilar Artery
•Basilar Artery splits into Posterior Cerebral Artery (PCA)
What are the vessels of the Vertebro-Basilar System?
- Vertebral Artery
- Basilar Artery
- Post Inferior Cerebellar Artery (PICA)
- Posterior Spinal Arteries
- Anterior Spinal Artery
- Anterior Inferior Cerebellar Artery (AICA)
- Pontine Artery
- Superior Cerebellar Artery
- Posterior Cerebral Artery (PCA)
What does the Internal Carotid Artery come from?
The splitting of the the common carotid in the neck