Cerebellar decompensation following a stroke in contralateral posterior parietal cortex

We describe here a patient who exhibited cerebellar hypermetria on the left side following a cerebellar ischemia in left cerebellar hemisphere. She su bsequently recovered clinically. However, twenty months after cerebellar is chemia, cerebellar symptoms reappeared suddenly. Moreover, kinematic and el ectromyographic (EMG) abnormalities during fast movements of left wrist wer e identical to those detected after the initial cerebellar lesion. Surprisi ngly, the causal lesion of this cerebellar decompensation was found to be a stroke at the level of the right posterior parietal association area. (C) 1999 Elsevier Science B.V. All rights reserved.