| Autor: |
Schugens MM; Neuropsychology, Faculty of Psychology, Ruhr-University of Bochum, Germany., Breitenstein C, Ackermann H, Daum I |
| Jazyk: |
angličtina |
| Zdroj: |
Behavioural neurology [Behav Neurol] 1999 Jan 01; Vol. 11 (3), pp. 149-57. |
| Abstrakt: |
Motor skill acquisition was investigated in patients with Parkinson's disease (PD) or cerebellar dysfunction using two sensory-guided tracking tasks. The subjects had to learn to track a visual target (a square) on a computer screen by moving a joystick under two different conditions. In the unreversed task, the horizontal target movements were semi-predictable and could be anticipated. In the reversed task, the horizontal movements of a pointer which had to be kept within the target square were mirror-reversed to the joystick movements. PD patients showed intact learning of the semi-predictable task and reduced learning of the mirror-reversed task; patients with cerebellar dysfunction showed the opposite pattern. These findings are discussed in relation to the differential contribution of the cerebellum and the striatum to motor skill acquisition: the cerebellum appears to participate in the implementation of anticipatory movements, whereas the striatum may be critically involved in types of motor learning which require a high degree of internal elaboration. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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