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Neuroanatomy - Vascularization

7 important questions on Neuroanatomy - Vascularization

Where does the arterial system of the brain consist of?

- internal carotid arteries
- vertebral arteries

Where do the internal carotid arteries come from?

They split off from the aorta and ascend from the neck area, through the petrosal bone and through the cavernous sinus (cooling). There is a curve in the arteries called the carotid siphon

Where do the vertebral arteries come from?

They split off from the aorta and ascend at two sides of the vertebral column. They enter the skull through the foramen magnum. The two vertebral arteries fuse at the level of the brain stem to form the basilar artery. Eventually, the basilar artery bifurcates into the posterior cerebral arteries.

Which arteries perfuse the hemispheres?

Three arteries:
- anterior cerebral arterie
- middle cerebral arterie
- posterior cerebral arterie

What parts of the brain does the middle cerebral artery (a. Cerebri media) perfuse?

Lateral surface of the frontal, parietal, occipital and temporal lobes. It is the largest artery and courses in between the temporal and frontal lobe

What parts of the brain does the posterior cerebral artery perfuse?

Lower inferior surface of the temporal, occipital lobe and the medial surface of the occipital lobe.

This artery turns backwards around the brainstem.

How is the spinal cord perfused?

There are arteries longitudinally along the spinal cord. These are the a. Spinalis anterior and a. Spinalis posterior (2x).

There are few arteries perusing the spinal cord, so it is vulnerable to lesions.

The question on the page originate from the summary of the following study material:

Introduction into the neurosciences

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Neuroanatomy - Vascularization

7 important questions on Neuroanatomy - Vascularization

Where does the arterial system of the brain consist of?

Where do the internal carotid arteries come from?

Where do the vertebral arteries come from?

Which arteries perfuse the hemispheres?

What parts of the brain does the middle cerebral artery (a. Cerebri media) perfuse?

What parts of the brain does the posterior cerebral artery perfuse?

How is the spinal cord perfused?

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