A case of infarction of the region from the declive to the tuber in the cerebellar vermis

We report a rare case of infarction limited in the region from the declive to the tuber of the posterior lobe in the cerebellar vermis. A 47-year-old woman complained of dizziness with acute onset. Mild incoordination of the left upper extremity and mild truncal and gait ataxia was noted. Brain magnetic resonance imaging showed an infarct of the region from the declive to the tuber on the left side. In the posterior lobe, the region from the declive to the tuber is associated with coordination of the hands. The dorsal spinocerebellar tract and the ventral spinocerebellar tract convey unconsciousness proprioceptive signals from the trunk and leg and project to the anterior and posterior lobes in the cerebellar vermis. Symptoms in our patient indicated that the lesion of this region was related to the impairment of these two tracts and incidence of incoordination of the lateral upper extremity.