COORDINATION OF AIMED MOVEMENTS IN A CASE OF UNILATERAL CEREBELLAR DAMAGE

Citation
P. Haggard et al., COORDINATION OF AIMED MOVEMENTS IN A CASE OF UNILATERAL CEREBELLAR DAMAGE, Neuropsychologia, 32(7), 1994, pp. 827-846
Citations number
35
Categorie Soggetti
Psychology, Experimental",Neurosciences,Psychology
Journal title
ISSN journal
00283932
Volume
32
Issue
7
Year of publication
1994
Pages
827 - 846
Database
ISI
SICI code
0028-3932(1994)32:7<827:COAMIA>2.0.ZU;2-A
Abstract
We have studies multi-joint arm movements in a patient with right cere bellar damage. Our patient's kinetic tremor was reduced in the absence of visual feedback, but increased when performing a concurrent cognit ive task. We suggest that her kinetic tremor reflects use of a slow co rtical feedback circuit for error-corrections during movement. Analysi ng the spatial relation between hand aperture and hand transport in pr ehensile movements, we found preserved strategic, trial-to-trial coord ination, but impaired reactive, within-trial coordination. We conclude that the proprioceptive representations provided by the normal cerebe llum play an important role in coordinating multi-joint movement.