May 11, 2010

Virtual hand illusion induced by visuomotor correlations

PloS One
Maria V Sanchez-VivesMel Slater

Abstract

Our body schema gives the subjective impression of being highly stable. However, a number of easily-evoked illusions illustrate its remarkable malleability. In the rubber-hand illusion, illusory ownership of a rubber-hand is evoked by synchronous visual and tactile stimulation on a visible rubber arm and on the hidden real arm. Ownership is concurrent with a proprioceptive illusion of displacement of the arm position towards the fake arm. We have previously shown that this illusion of ownership plus the proprioceptive displacement also occurs towards a virtual 3D projection of an arm when the appropriate synchronous visuotactile stimulation is provided. Our objective here was to explore whether these illusions (ownership and proprioceptive displacement) can be induced by only synchronous visuomotor stimulation, in the absence of tactile stimulation. To achieve this we used a data-glove that uses sensors transmitting the positions of fingers to a virtually projected hand in the synchronous but not in the asynchronous condition. The illusion of ownership was measured by means of questionnaires. Questions related to ownership gave significantly larger values for the synchronous than for the asynchronous condition. Proprioceptive d...Continue Reading

  • References14
  • Citations94
  • References14
  • Citations94

Mentioned in this Paper

Right Upper Arm Structure
Neuro-Oncological Ventral Antigen 2
Establishment and Maintenance of Localization
Hand
Molecular Motor Activity
Brain
Visual Perception
Structure of Left Hand
Fingers
Myopathy

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