Abstract
We report two patients with an ocular tilt reaction (OTR) due to unilateral caudal cerebellar lesion. One patient had a caudal cerebellar hemorrhage, the other a posterior inferior cerebellar artery territory infarct. There was head tilt in both patients which had not been reported previously. These findings support the previous proposal that the mechanism of a tonic contraversive OTR with unilateral cerebellar lesion is an increased tonic resting activity in the ipsilesional vestibular nucleus due to a loss of inhibition from the lesioned nodulus.
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