Planning movements in a simple redundant task

Current Biology : CB
Philipp VetterDaniel M Wolpert

Abstract

There are infinitely many different combinations of arm postures which will place the hand at the same point in space. Given this abundance, how is one configuration chosen over another? Two main hypotheses have been proposed to solve this problem. Postural models suggest that the posture adopted is purely determined by the desired hand position (known as Donders' law). Transport models suggest that the adopted posture depends on where the hand has moved from. A specific transport model, the minimum work model, has been proposed in which the adopted posture is the one that minimizes the amount of work required to move the hand to the new location. The postural model predicts that the posture will be independent of where the hand has moved from, whereas the transport models predict that the posture will depend on the previous posture. We have devised a simple redundant task-touching a target bar using a hand-held virtual stick-to examine these models. The results show that neither model alone can account for the data. We propose a control planning strategy in which there is a combined cost function that has both a postural term as well as a transport term.

References

Jan 1, 1995·Experimental Brain Research·S I TilleryJ F Soechting
Nov 11, 1998·Neuroscience and Biobehavioral Reviews·M DesmurgetC Prablanc

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Citations

Jul 3, 2004·Experimental Brain Research·Sherry WattsJon Hore
Apr 22, 2009·Biological cybernetics·Biljana Petreska, Aude Billard
Feb 15, 2013·The Journal of Neuroscience : the Official Journal of the Society for Neuroscience·Rajiv RanganathanFerdinando A Mussa-Ivaldi
Aug 12, 2009·Journal of Physiology, Paris·O KhatibS Delp
Dec 19, 2017·Frontiers in Neurorobotics·Paolo Tommasino, Domenico Campolo
Mar 4, 2003·Journal of Neurophysiology·Mary D Klein BretelerMartha Flanders
Oct 29, 2011·Nature Reviews. Neuroscience·Daniel M WolpertJ Randall Flanagan
Jul 8, 2011·Journal of Neurophysiology·Bastien BerretThierry Pozzo
Dec 23, 2016·Bioinspiration & Biomimetics·Paolo Tommasino, Domenico Campolo
Aug 24, 2004·Motor Control·Marjan A AdmiraalStan C A M Gielen

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