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Serveur d'exploration sur les dispositifs haptiques

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Haptic information stabilizes and destabilizes coordination dynamics.

Identifieur interne : 000211 ( Ncbi/Curation ); précédent : 000210; suivant : 000212

Haptic information stabilizes and destabilizes coordination dynamics.

Auteurs : J. A. Kelso ; P. W. Fink ; C. R. Delaplain ; R. G. Carson

Source :

RBID : PMC:1088728

English descriptors

Abstract

Goal-directed, coordinated movements in humans emerge from a variety of constraints that range from 'high-level' cognitive strategies based on perception of the task to 'low-level' neuromuscular-skeletal factors such as differential contributions to coordination from flexor and extensor muscles. There has been a tendency in the literature to dichotomize these sources of constraint, favouring one or the other rather than recognizing and understanding their mutual interplay. In this experiment, subjects were required to coordinate rhythmic flexion and extension movements with an auditory metronome, the rate of which was systematically increased. When subjects started in extension on the beat of the metronome, there was a small tendency to switch to flexion at higher rates, but not vice versa. When subjects were asked to contact a physical stop, the location of which was either coincident with or counterphase to the auditory stimulus, two effects occurred. When haptic contact was coincident with sound, coordination was stabilized for both flexion and extension. When haptic contact was counterphase to the metronome, coordination was actually destabilized, with transitions occurring from both extension to flexion on the beat and from flexion to extension on the beat. These results reveal the complementary nature of strategic and neuromuscular factors in sensorimotor coordination. They also suggest the presence of a multimodal neural integration process - which is parametrizable by rate and context - in which intentional movement, touch and sound are bound into a single, coherent unit.


Url:
DOI: 10.1098/rspb.2001.1620
PubMed: 11375110
PubMed Central: 1088728

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PMC:1088728

Le document en format XML

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