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Adaptation of the precision grip orientation to a visual-haptic mismatch

Identifieur interne : 000D55 ( PascalFrancis/Curation ); précédent : 000D54; suivant : 000D56

Adaptation of the precision grip orientation to a visual-haptic mismatch

Auteurs : Cornelia Weigelt [Allemagne] ; Otmar Bock [Allemagne]

Source :

RBID : Pascal:10-0177086

Descripteurs français

English descriptors

Abstract

Using a sequential-exposure approach, we examined sensorimotor adaptation of precision grip orientation to a visuo-haptic mismatch. Subjects (n = 41) were asked to grasp with thumb and index finger mirror-viewed objects. They could not see their hand due to the mirror, but they could feel an object located behind the mirror in the same place as the viewed object. When a -15° orientation mismatch between viewed and felt object was introduced, subjects adapted to it by gradually modifying the orientation of their finger opposition axis. When the visuo-haptic mismatch further changed to -30° or to +15°, subjects continued to perform according to their pre-established adaptive state, and gradually modified it until it became adequate for the new mismatch. This outcome supports the existence of a continuously acting mechanism for grasping adaptation, similar to that previously described for pointing and tracking adaptation. Precision grip adaptation generalized to unpracticed object orientations, which suggests that adaptation was based on a sensorimotor recalibration rather than the learning of specific stimulus-response pairs. Transfer to pointing movements was found only when similarity to the grasp adaptation task was high.
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A08 01  1  ENG  @1 Adaptation of the precision grip orientation to a visual-haptic mismatch
A11 01  1    @1 WEIGELT (Cornelia)
A11 02  1    @1 BOCK (Otmar)
A14 01      @1 Institute for Physiology and Anatomy, German Sport University @2 Cologne @3 DEU @Z 1 aut. @Z 2 aut.
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C01 01    ENG  @0 Using a sequential-exposure approach, we examined sensorimotor adaptation of precision grip orientation to a visuo-haptic mismatch. Subjects (n = 41) were asked to grasp with thumb and index finger mirror-viewed objects. They could not see their hand due to the mirror, but they could feel an object located behind the mirror in the same place as the viewed object. When a -15° orientation mismatch between viewed and felt object was introduced, subjects adapted to it by gradually modifying the orientation of their finger opposition axis. When the visuo-haptic mismatch further changed to -30° or to +15°, subjects continued to perform according to their pre-established adaptive state, and gradually modified it until it became adequate for the new mismatch. This outcome supports the existence of a continuously acting mechanism for grasping adaptation, similar to that previously described for pointing and tracking adaptation. Precision grip adaptation generalized to unpracticed object orientations, which suggests that adaptation was based on a sensorimotor recalibration rather than the learning of specific stimulus-response pairs. Transfer to pointing movements was found only when similarity to the grasp adaptation task was high.
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C03 01  X  ENG  @0 Gripping @5 01
C03 01  X  SPA  @0 Prension @5 01
C03 02  X  FRE  @0 Orientation @5 02
C03 02  X  ENG  @0 Orientation @5 02
C03 02  X  SPA  @0 Orientación @5 02
C03 03  X  FRE  @0 Séquentiel @5 03
C03 03  X  ENG  @0 Sequential @5 03
C03 03  X  SPA  @0 Secuencial @5 03
C03 04  X  FRE  @0 Pouce @5 04
C03 04  X  ENG  @0 Thumb @5 04
C03 04  X  SPA  @0 Pulgar @5 04
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C03 07  X  FRE  @0 Cinématique @5 07
C03 07  X  ENG  @0 Kinematics @5 07
C03 07  X  SPA  @0 Cinemática @5 07
C03 08  X  FRE  @0 Homme @5 54
C03 08  X  ENG  @0 Human @5 54
C03 08  X  SPA  @0 Hombre @5 54
C03 09  X  FRE  @0 Perception haptique @4 CD @5 96
C03 09  X  ENG  @0 Haptic perception @4 CD @5 96
C07 01  X  FRE  @0 Processus acquisition @5 20
C07 01  X  ENG  @0 Acquisition process @5 20
C07 01  X  SPA  @0 Proceso adquisición @5 20
N21       @1 116
N44 01      @1 OTO
N82       @1 OTO

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Pascal:10-0177086

Le document en format XML

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