Stroke Overview

(Left) Axial DWI MR shows

hyperintensity related to

acute ischemia ſt in the

lateral midbrain ﬇, posterior

hippocampus. This represents

penetrating artery infarction

(thalamoperforating,

thalamogeniculate arteries).

(Right) Axial DWI MR shows

diffusion restriction related to

acute ischemia ſt in a

pontine-perforating artery

distribution.

(Left) Axial graphic shows the

cerebellar artery distributions.

The superior cerebellar artery

(SCA)

﬊ (green) supplies the

superior cerebellum. The

posterior inferior cerebellar

artery (PICA) (peach) ſt

supplies the majority of the

inferior cerebellum and lateral

medulla. The anterior inferior

cerebellar artery (AICA)

(yellow) supplies the petrosal

surface of the cerebellum.

(Right) Axial T2WI MR shows

hyperintensity in the right

inferior cerebellum

﬊ and

lateral medulla

﬈ related to a

PICA infarct from a vertebral

artery embolus.

(Left) Axial T2WI MR shows

hyperintensity and local mass

effect in the right superior

cerebellum

﬊ related to an

acute SCA infarct. SCA infarcts

may involve the superior

cerebellum and the upper

lateral pons. (Right) Axial DWI

MR shows acute diffusion

restriction ﬇ in the anterior,

inferior cerebellum laterally in

an AICA distribution. AICA

primarily supplies the ventral

pons and petrosal surface of

the cerebellar hemispheres,

the brachium pontis, flocculus,

and inner ear as well as CN7

and CN8.

Trauma, and Stroke

Brain: Pathology-Based Diagnoses: Malformations,

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