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Natural unconstrained movements obey rules different from constrained elementary movements

Published online by Cambridge University Press:  04 February 2010

Michel Desmurget,
Yves Rossetti and
Claude Prablanc
Michel Desmurget
Affiliation:
INSERM Unité94, Vision et Motricté 69500 Bron, France. prablanc@f rmop11.cnusc.fr
Yves Rossetti
Affiliation:
INSERM Unité94, Vision et Motricté 69500 Bron, France. prablanc@f rmop11.cnusc.fr
Claude Prablanc
Affiliation:
INSERM Unité94, Vision et Motricté 69500 Bron, France. prablanc@f rmop11.cnusc.fr
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Abstract

The concept of a conservative control strategy minimizing the number of degrees of freedom used is criticised with reference to 3-D simple reaching and grasping experiments. The vector error in a redundant system would not be the prime controlled variable, but rather the posture for reaching, as exemplified by nearly straight displacements in joint space as opposed to curved ones in task space.

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Open Peer Commentary
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Behavioral and Brain Sciences , Volume 18 , Issue 4 , December 1995, pp. 750
Copyright
Copyright © Cambridge University Press 1995

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