Anterior inferior cerebellar artery (AICA) infarct

Anterior inferior cerebellar artery (AICA) territory infarcts are much less common than posterior inferior cerebellar artery (PICA) infarcts.

AICA territory infarcts are rare, comprising ~1% of ischaemic cerebellar strokes 2

AICA stroke syndrome presents with vertigo, ataxia, peripheral facial palsy and/or hypoacusis 1-3:

Acute interruption of blood flow through the AICA which leads to deprivation of oxygen and glucose in the vascular territory supplied. This phenomenon triggers a cascade of events at a cellular level, that if the circulation is not restored in time, will lead to cell death.

The main cause of AICA territory stroke is atherosclerosis, but can also be a lacunar infarct due to hypertension or thromboembolism, although sometimes the cause is not known.

Generally, the features are those of brain infarction but in the anterior cerebellar artery vascular territory: middle cerebellar peduncle, inferolateral portion of the pons, flocculus, and anteroinferior surface of the cerebellum. As such these features are discussed in the generic article: cerebral infarction.


Stroke and intracranial haemorrhage
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Article Information

rID: 45633
Section: Gamuts
Tag: stroke
Synonyms or Alternate Spellings:
  • AICA infarction
  • Anterior inferior cerebellar artery (AICA) infarction
  • AICA infarct
  • Anterior inferior cerebellar arterial infarct
  • Anterior inferior cerebellar arterial infarction
  • AICA stroke

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    Figure 1: AICA anatomy
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