Anterior inferior cerebellar artery

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Anterior inferior cerebellar artery
The three major arteries of the cerebellum: the SCA, AICA, and PICA (anterior inferior cerebellar artery is AICA)
Circle of Willis en.svg
Diagram of the arterial circulation at the base of the brain (anterior inferior cerebellar artery labeled at lower right)
Latin Arteria cerebelli inferior anterior
Basilar artery
Labyrinthine artery
Inferior cerebellar veins
Supplies Cerebellum
Gray's p.580
TA A12.2.08.019
FMA 50544
Anatomical terminology

The anterior inferior cerebellar artery (AICA) is an artery in the brain that supplies part of the cerebellum.

It arises from the basilar artery at the level of the junction between the medulla oblongata and the pons in the brainstem. It passes backward to be distributed to the anterior part of the undersurface of the cerebellum, anastomosing with the posterior inferior cerebellar branch of the vertebral artery. It supplies the anterior inferior quarter of the cerebellum.

It also gives off the labyrinthine artery in most cases; however, the labyrinthine artery can emerge as a branch of the basilar artery in others.

Clinical significance[edit]

Occlusion of AICA results in lateral pontine syndrome, also known as AICA syndrome. The symptoms include sudden onset vertigo and vomiting, nystagmus, falling to the side of the lesion (due to damage to vestibular nuclei), ipsilateral loss of sensation of the face (due to damage to principal sensory trigeminal nucleus), ipsilateral facial paralysis (due to damage to the facial nucleus) and ipsilateral hearing loss and tinnitus (due to damage to the cochlear nuclei).


This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)

External links[edit]

The arteries of the base of the brain. Anterior inferior cerebellar labeled near bottom. The temporal pole of the cerebrum and a portion of the cerebellar hemisphere have been removed on the right side. Inferior aspect (viewed from below).