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Lateral Medulla and Inferior Cerebellar Infarction

An 85 year-old woman presented with vertigo, nausea and vomiting. Examination showed a left sided Horner's syndrome, left facial numbness, left sided ataxia, weakness of the left soft palate, slurred speech, and numbness over the right side of the body.

Show the Lateral Medullary Infarction     Show the Inferior Cerebellar Infarction     Show the Regional Anatomy

Lateral Medullary and Inferior Cerebellar Infarction: Flair axial MRIs of the lower medulla. Note the bright signal in the lateral medulla and inferior cerebellum on the left. This infarct is in the distribution of the posterior inferior cerebellar artery (PICA). Infarctions in the PICA territory result in a Wallenberg's syndrome: nausea, vomiting, and vertigo; ipsilateral facial numbness; weakness of the ipsilateral soft palate; ipsilateral ataxia; contralateral numbness of the body; and ipsilateral Horner's syndrome (ptosis, miosis, anhidrosis).

Revised 11/29/06
Copyrighted 2006. David C Preston