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Question 1

What provides the posterior brain circulation?

Answer 1

Posterior brain circulation is provided by the vertebral arteries, which branch off from the subclavian arteries and finally come together to form the basilar artery.

Question 2

How do the vertebral arteries reach the basilar artery?

Answer 2

The vertebral arteries run through the transverse foramina of the cervical vertebrae, then merge at the pons to create the basilar artery.

Question 3

What does the posterior inferior cerebellar artery (PICA) supply?

Answer 3

The posterior inferior cerebellar artery (PICA) supplies the cerebellum and a part of the medulla oblongata.

Question 4

What arteries does the basilar artery give rise to?

Answer 4

The basilar artery gives rise to the anterior inferior cerebellar artery (AICA), superior cerebellar artery, and posterior cerebral artery (PCA).

Question 5

What does the anterior inferior cerebellar artery (AICA) supply?

Answer 5

The anterior inferior cerebellar artery (AICA) supplies segments of the cerebellum.

Question 6

What does the superior cerebellar artery supply?

Answer 6

The superior cerebellar artery supplies the superior cerebellum.

Question 7

What does the posterior cerebral artery (PCA) supply?

Answer 7

The posterior cerebral artery (PCA) supplies the occipital lobe and temporal lobe areas, which are significant for visual processing.

Question 8

What symptoms result from a PICA stroke?

Answer 8

PICA stroke results in lateral medullary syndrome (Wallenberg syndrome), with the medulla oblongata, leading to dysphagia, dysarthria, and ataxia.

Question 9

What symptoms can result from a posterior cerebral artery stroke?

Answer 9

Posterior cerebral artery strokes can lead to visual disturbances, such as hemianopia or visual agnosia.