HapticV1, PubMed, Curation, bibRecord, 000963

Predictive mechanisms in the control of contour following.

Identifieur interne : 000963 ( PubMed/Curation ); précédent : 000962; suivant : 000964

Predictive mechanisms in the control of contour following.

Auteurs : Julian J. Tramper [États-Unis] ; Martha Flanders

Source :

Experimental brain research [ 1432-1106 ] ; 2013.

RBID : pubmed:23649968

English descriptors

KwdEn :
- Adult, Female, Forecasting, Form Perception (physiology), Humans, Male, Proprioception (physiology), Psychomotor Performance (physiology), Time Factors, Young Adult.
MESH :
- physiology : Form Perception, Proprioception, Psychomotor Performance.
- Adult, Female, Forecasting, Humans, Male, Time Factors, Young Adult.

Abstract

In haptic exploration, when running a fingertip along a surface, the control system may attempt to anticipate upcoming changes in curvature in order to maintain a consistent level of contact force. Such predictive mechanisms are well known in the visual system, but have yet to be studied in the somatosensory system. Thus, the present experiment was designed to reveal human capabilities for different types of haptic prediction. A robot arm with a large 3D workspace was attached to the index fingertip and was programmed to produce virtual surfaces with curvatures that varied within and across trials. With eyes closed, subjects moved the fingertip around elliptical hoops with flattened regions or Limaçon shapes, where the curvature varied continuously. Subjects anticipated the corner of the flattened region rather poorly, but for the Limaçon shapes, they varied finger speed with upcoming curvature according to the two-thirds power law. Furthermore, although the Limaçon shapes were randomly presented in various 3D orientations, modulation of contact force also indicated good anticipation of upcoming changes in curvature. The results demonstrate that it is difficult to haptically anticipate the spatial location of an abrupt change in curvature, but smooth changes in curvature may be facilitated by anticipatory predictions.

DOI: 10.1007/s00221-013-3529-x
PubMed: 23649968

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Le document en format XML

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<author><name sortKey="Tramper, Julian J" sort="Tramper, Julian J" uniqKey="Tramper J" first="Julian J" last="Tramper">Julian J. Tramper</name>
<affiliation wicri:level="1"><nlm:affiliation>Department of Neuroscience, University of Minnesota, 321 Church St SE, Minneapolis, MN 55455, USA.</nlm:affiliation>
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<wicri:regionArea>Department of Neuroscience, University of Minnesota, 321 Church St SE, Minneapolis, MN 55455</wicri:regionArea>
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<author><name sortKey="Flanders, Martha" sort="Flanders, Martha" uniqKey="Flanders M" first="Martha" last="Flanders">Martha Flanders</name>
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<front><div type="abstract" xml:lang="en">In haptic exploration, when running a fingertip along a surface, the control system may attempt to anticipate upcoming changes in curvature in order to maintain a consistent level of contact force. Such predictive mechanisms are well known in the visual system, but have yet to be studied in the somatosensory system. Thus, the present experiment was designed to reveal human capabilities for different types of haptic prediction. A robot arm with a large 3D workspace was attached to the index fingertip and was programmed to produce virtual surfaces with curvatures that varied within and across trials. With eyes closed, subjects moved the fingertip around elliptical hoops with flattened regions or Limaçon shapes, where the curvature varied continuously. Subjects anticipated the corner of the flattened region rather poorly, but for the Limaçon shapes, they varied finger speed with upcoming curvature according to the two-thirds power law. Furthermore, although the Limaçon shapes were randomly presented in various 3D orientations, modulation of contact force also indicated good anticipation of upcoming changes in curvature. The results demonstrate that it is difficult to haptically anticipate the spatial location of an abrupt change in curvature, but smooth changes in curvature may be facilitated by anticipatory predictions.</div>
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Predictive mechanisms in the control of contour following.

Predictive mechanisms in the control of contour following.

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Links to Exploration step

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

Pour générer des pages wiki