Abstract

Introduction

Materials & Methods

Results

Discussion & Conclusion

References

Discussion
Board

Selected impairments in visuomotor control were qualitatively assessed using a group of visually guided tracking and pointing tasks in a single case study of focal lesions in the cerebellum and brainstem revealed by MRI. In addition to bilateral action tremor in the arms, the impairments in visuomotor control included inaccuracy of tracking velocity, increase in spatial variability when pointing to a visual target and delay in simple reaction time. Interestingly, however, the patient was able to adapt to a gain change in the visual feedback during pointing, and his adaptation was less affected than control subjects by trial-to-trial random fluctuations in visual feedback. In this patient, impairments in visuomotor control could be correlated with focal lesions, which provide further evidence of the functional compartmentalisation of the cerebellar-brainstem network.

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Poster Number PAliu0134
Keywords: Visuomotor, cerebellum, brainstem, tremor, adaptation