Pixelated Brain: Module 10, Section 3 - The posterior arterial supply to the brain

MODULE 10 - SECTION 3 - THE POSTERIOR ARTERIAL SUPPLY to the BRAIN

THE VERTEBRAL ARTERY
enters through the
FORAMEN MAGNUM

The posterior cerebral artery supplies the medial surface of the occipital lobe and the basal surface of the occipital and temporal lobes. In addition, like the anterior cerebral, it sends branches around the "corner" on to the lateral surface of the hemisphere.

Look at the next 3 slide sections for the blood supply to the hemisphere and the maps given in Blumenfeld's Figures 10.5 & 10.9 to confirm the region of the hemisphere supplied by the posterior cerebral artery.

FOREBRAIN BLOOD SUPPLY
SLIDE 30

FOREBRAIN BLOOD SUPPLY
SLIDE 22

FOREBRAIN BLOOD SUPPLY
SLIDE 14

Now look at our sections for the blood supply to the brainstem.

BRAINSTEM BLOOD SUPPLY
SLIDE 18

BRAINSTEM BLOOD SUPPLY
SLIDE 14

BRAINSTEM BLOOD SUPPLY
SLIDE 10

BRAINSTEM BLOOD SUPPLY
SLIDE 6

MODULE 10 - SECTION 3 - THE POSTERIOR ARTERIAL SUPPLY to the BRAIN
Figure 10-3	- - - This part of the system is fed by the two vertebral arteries which join at the border between the medulla and pons to form the basilar artery(Figure 10-3 again). This is the only example we can think of in the body in which two arteries join as they pass to the periphery to form a single, larger vessel - and one can't help but wonder if the "purpose" is to insure a constant blood supply to that relatively small part of the brain (the brainstem) the function of which is essential for the maintenance of life.
1
	THE VERTEBRAL ARTERY enters through the FORAMEN MAGNUM In the lower part of this figure the left vertebral has been cut just below the point where it joins the right vertebral to form the basilar artery; just above this, the basilar can be seen running between the basilar pons and the base of the skull.
2
	BLOOD SUPPLY of the BRAIN a BASAL VIEW The basilar artery ends by giving off two branches, the superior cerebellar and posterior cerebral arteries . The oculomotor nerve passes between these two vessels as it exits from the brainstem; this is an important relationship.
3
	The posterior cerebral artery supplies the medial surface of the occipital lobe and the basal surface of the occipital and temporal lobes. In addition, like the anterior cerebral, it sends branches around the "corner" on to the lateral surface of the hemisphere.
4
Look at the next 3 slide sections for the blood supply to the hemisphere and the maps given in Blumenfeld's Figures 10.5 & 10.9 to confirm the region of the hemisphere supplied by the posterior cerebral artery.
5
	FOREBRAIN BLOOD SUPPLY SLIDE 30
6
	FOREBRAIN BLOOD SUPPLY SLIDE 22
7
	FOREBRAIN BLOOD SUPPLY SLIDE 14
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BLOOD SUPPLY of the BRAIN a BASAL VIEW THE CIRCLE of WILLIS and SURROUNDING AREA	THE PATTERN of BLOOD SUPPLY is the SAME at all levels of the CENTRAL NERVOUS SYSTEM The basic plan of the blood supply to the brain stem is the same at all levels and is illustrated here. The long circumferential branches are derived, in ascending order, from the posterior inferior cerebellar artery, the anterior inferior cerebellar artery, the superior cerebellar artery and the posterior cerebral artery.
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Now look at our sections for the blood supply to the brainstem.
10
	BRAINSTEM BLOOD SUPPLY SLIDE 18
11
	BRAINSTEM BLOOD SUPPLY SLIDE 14
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	BRAINSTEM BLOOD SUPPLY SLIDE 10
13
	BRAINSTEM BLOOD SUPPLY SLIDE 6
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