Abstract
We reported on three patients with pure dysarthria. All of them were admitted to our hospital due to sudden onset of dysarthria. On admission, none of the patients showed any neurological abnormality except for dysarthria. Brain MRI of all three patients revealed a small infarct limited to the posterior limb of the internal capsule. In all cases, the clinical symptom completely disappeared in a few days. Pure dysarthria due to a lacunar infarct of the posterior limb of the internal capsule is extremely rare. Our three cases suggest that pure dysarthria may be caused by the disruption of the corticobulbar tract not only in the genu but also in the posterior limb of the internal capsule.
