Spatio-temporal and kinematic analysis of pointing movements performed by cerebellar patients with limb ataxia

Three patients with cerebellar limb ataxia and three age-matched controls performed arm-pointing movements towards a visual stimulus during an experimental procedure using a double-step paradigm in a three-dimensional space. Four types of trajectories were defined: P1, single-step pointing movement...

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Bibliographic Details
Published in:Experimental brain research 1998-04, Vol.119 (4), p.460-466
Main Authors: BONNEFOI-KYRIACOU, B, LEGALLET, E, LEE, R. G, TROUCHE, E
Format: Article
Language:English
Subjects:
Adult
Ataxia
Biological and medical sciences
Cerebellar Ataxia - physiopathology
Female
Humans
Male
Medical sciences
Middle Aged
Movement - physiology
Nervous system (semeiology, syndromes)
Nervous system as a whole
Neurology
Photic Stimulation
Psychomotor Performance - physiology
Reaction Time - physiology
Space Perception - physiology
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Summary:Three patients with cerebellar limb ataxia and three age-matched controls performed arm-pointing movements towards a visual stimulus during an experimental procedure using a double-step paradigm in a three-dimensional space. Four types of trajectories were defined: P1, single-step pointing movement towards the visual stimulus in the initial position S1; P2, double-step pointing movement towards S1; P3, double-step straight pointing movement towards the second position S2; and P4, double-step pointing movement towards S2 with an initial direction towards S1. We found that the cerebellar patients, as well as the controls, were able to modify their motor programs, but with impaired timing, severe anomalies in the direction and amplitude of the changed movement trajectories and alteration of the precision of the pointing movements.
ISSN:0014-4819
1432-1106
DOI:10.1007/s002210050361