HapticV1, Main, Exploration, bibRecordById, pubmed:12110966

Haptic discrimination of object shape in humans: contribution of cutaneous and proprioceptive inputs

Identifieur interne : 007381 ( Main/Exploration ); précédent : 007380; suivant : 007382

Haptic discrimination of object shape in humans: contribution of cutaneous and proprioceptive inputs

Auteurs : Julien Voisin [Canada] ; Yves Lamarre [Canada] ; C. Elaine Chapman [Canada]

Source :

Experimental brain research [ 0014-4819 ] ; 2002.

RBID : Pascal:03-0033726

Descripteurs français

Pascal (Inist)
- Cognition, Forme stimulus, Homme, Mécanorécepteur, Mémoire, Perception haptique, Proprioception, Rétroaction, Sensibilité tactile, Forme stimulus, Tâche discrimination, Mécanorécepteur, Proprioception, Rétroaction, Cognition, Mémoire, Homme, Perception haptique.
Wicri :
- topic : Homme.

English descriptors

KwdEn :
- Adult, Analysis of Variance, Anesthetics, Local (pharmacology), Cognition, Discrimination (Psychology) (drug effects), Discrimination (Psychology) (physiology), Discrimination task, Feedback regulation, Female, Fingers (physiology), Haptic perception, Human, Humans, Male, Mechanoreceptor, Memory, Proprioception, Proprioception (drug effects), Proprioception (physiology), Recognition (Psychology) (physiology), Shoulder (physiology), Stimulus shape, Tactile sensitivity, Touch (drug effects), Touch (physiology).
MESH :
- chemical , pharmacology : Anesthetics, Local.
- drug effects : Discrimination (Psychology), Proprioception, Touch.
- physiology : Discrimination (Psychology), Fingers, Proprioception, Recognition (Psychology), Shoulder, Touch.
- Adult, Analysis of Variance, Female, Humans, Male.

Abstract

Using two-dimensional (2D) angles composed of two straight, 8-cm-long arms that formed an angle, we investigated the importance of cutaneous feedback from the exploring index finger, and proprioceptive feedback from the shoulder (scanning movements made with the outstretched arm), to the human ability to discriminate small differences in the angles. Using a two-alternative forced-choice paradigm, subjects identified the larger angle in each pair explored (standard angle, 90°; comparison angles, 91° to 103°). Subjects were tested under four experimental conditions: (1) active touch (reference condition); (2) active touch with digital anaesthesia; (3) passive touch (a computer-controlled device displaced the angle under the subject's immobile digit); and (4) passive touch with digital anaesthesia. When only proprioceptive feedback from the shoulder was available (condition 2), there was a significant increase in discrimination threshold, from 4.0° in the reference condition (condition 1) to 7.2°, indicating that cutaneous feedback from the exploring digit contributed to task performance. When only cutaneous feedback from the finger was available (condition 3), there was also a significant increase in threshold from 4.2° in the active condition to 8.7°. This suggested that proprioceptive feedback from the shoulder, potentially from a variety of deep (muscle and joint) but also cutaneous receptors, contributed to the ability tc discriminate small changes in 2D angles. When both sources of feedback were eliminated (condition 4), subjects were unable to discriminate even the largest difference presented (13°). The results suggest that this sensory task is truly an integrative task drawing on sensory in formation from two different submodalities and so, following the definition of Gibson, is haptic in nature. The results are discussed in relation to the potential neural mechanisms that might underlie a task that requires integration across two anatomically separate body parts and two distinct modalities.

Affiliations:

Canada

Le document en format XML

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<front><div type="abstract" xml:lang="en">Using two-dimensional (2D) angles composed of two straight, 8-cm-long arms that formed an angle, we investigated the importance of cutaneous feedback from the exploring index finger, and proprioceptive feedback from the shoulder (scanning movements made with the outstretched arm), to the human ability to discriminate small differences in the angles. Using a two-alternative forced-choice paradigm, subjects identified the larger angle in each pair explored (standard angle, 90°; comparison angles, 91° to 103°). Subjects were tested under four experimental conditions: (1) active touch (reference condition); (2) active touch with digital anaesthesia; (3) passive touch (a computer-controlled device displaced the angle under the subject's immobile digit); and (4) passive touch with digital anaesthesia. When only proprioceptive feedback from the shoulder was available (condition 2), there was a significant increase in discrimination threshold, from 4.0° in the reference condition (condition 1) to 7.2°, indicating that cutaneous feedback from the exploring digit contributed to task performance. When only cutaneous feedback from the finger was available (condition 3), there was also a significant increase in threshold from 4.2° in the active condition to 8.7°. This suggested that proprioceptive feedback from the shoulder, potentially from a variety of deep (muscle and joint) but also cutaneous receptors, contributed to the ability tc discriminate small changes in 2D angles. When both sources of feedback were eliminated (condition 4), subjects were unable to discriminate even the largest difference presented (13°). The results suggest that this sensory task is truly an integrative task drawing on sensory in formation from two different submodalities and so, following the definition of Gibson, is haptic in nature. The results are discussed in relation to the potential neural mechanisms that might underlie a task that requires integration across two anatomically separate body parts and two distinct modalities.</div>
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Serveur d'exploration sur les dispositifs haptiques

Haptic discrimination of object shape in humans: contribution of cutaneous and proprioceptive inputs

Haptic discrimination of object shape in humans: contribution of cutaneous and proprioceptive inputs

Source :

Descripteurs français

English descriptors

Abstract

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

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri

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