Dissociation of 'on-line' and 'off-line' visuomotor control of the arm by focal lesions in the cerebellum and brainstem
Research output: Contribution to journal › Article › peer-review
Authors
Colleges, School and Institutes
External organisations
- University of Oxford
- Radcliffe Infirmary
Abstract
Visuomotor control of the arm was assessed in a single case study of a subject with focal lesions in the cerebellum and brainstem. A dissociation between 'on-line' and 'off-line' visuomotor control was revealed: impairments in 'on-line' visuomotor control included inaccuracy of tracking velocity, increase in spatial pointing variability and a delay in simple reaction time; whereas the patient was able to adapt to a gain change in 'off-line' visual feedback during a pointing task, and his adaptation was less affected than that of control subjects by trial-to-trial random fluctuations in 'off-line' visual feedback. We conclude that focal damage in the cerebellar peduncles may be principally responsible for this dissociation.
Details
Original language | English |
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Pages (from-to) | 121-124 |
Number of pages | 4 |
Journal | Neuroscience Letters |
Volume | 264 |
Issue number | 1-3 |
Publication status | Published - 2 Apr 1999 |
Keywords
- Adaptation, Brainstem, Cerebellum, Tracking, Visuomotor control