A Case of Midbrain Infarction Presenting with Dysarthria

Abstract

The common causal lesions of pure dysarthria syndrome were known as anterior or posterior internal capsule, genu of internal capsule, adjacent corona radiata, or pons. And there are a few reports showed that bilateral small thalamic infarctions or paravermal cerebellar infarction also caused pure dysarthria.

The rostral cerebellum, especially paravermal region is thought to have a major role in coordination of speech. The paravermal region is intimately connected to caudal red nucleus. We report a patient with acute dysarthria and minimal contralateral

limb ataxia, in whom the causal lesion was in caudal red nucleus and superior part of decussation of brachium conjunctivum.