Impact of visuomotor feedback on the embodiment of virtual hands detached from the body

It has been shown that mere observation of body discontinuity leads to diminished body ownership. However, the impact of body discontinuity has mainly been investigated in conditions where participants observe a collocated static virtual body from a first-person perspective. This study explores the influence of body discountinuity on the sense of embodiment, when rich visuomotor correlations between a real and an artificial virtual body are established. In two experiments, we evaluated body ownership and motor performance, when participants interacted in virtual reality either using virtual hands connected or disconnected from a body. We found that even under the presence of congruent visuomotor feedback, mere observation of body discontinuity resulted in diminished embodiment. Contradictory evidence was found in relation to motor performance, where further research is needed to understand the role of visual body discontinuity in motor tasks. Preliminary findings on physiological reactions to a threat were also assessed, indicating that body visual discontinuity does not differently impact threat-related skin conductance responses. The present results are in accordance with past evidence showing that body discontinuity negatively impacts embodiment. However, further research is needed to understand the influence of visuomotor feedback and body morphological congruency on motor performance and threat-related physiological reactions.

[1]  Y. Benjamini,et al.  Controlling the false discovery rate: a practical and powerful approach to multiple testing , 1995 .

[2]  Jonathan D. Cohen,et al.  Rubber hands ‘feel’ touch that eyes see , 1998, Nature.

[3]  R. Passingham,et al.  That's My Hand! Activity in Premotor Cortex Reflects Feeling of Ownership of a Limb , 2004, Science.

[4]  J. Maunsell,et al.  Touching a Rubber Hand: Feeling of Body Ownership Is Associated with Activity in Multisensory Brain Areas , 2005, The Journal of Neuroscience.

[5]  P. Haggard,et al.  The rubber hand illusion revisited: visuotactile integration and self-attribution. , 2005, Journal of experimental psychology. Human perception and performance.

[6]  R. Dolan,et al.  Threatening a rubber hand that you feel is yours elicits a cortical anxiety response , 2007, Proceedings of the National Academy of Sciences.

[7]  Maria V. Sanchez-Vives,et al.  Inducing Illusory Ownership of a Virtual Body , 2009, Front. Neurosci..

[8]  Maria V. Sanchez-Vives,et al.  Virtual Hand Illusion Induced by Visuomotor Correlations , 2010, PloS one.

[9]  Maria V. Sanchez-Vives,et al.  First Person Experience of Body Transfer in Virtual Reality , 2010, PloS one.

[10]  Valeria I. Petkova,et al.  From Part- to Whole-Body Ownership in the Multisensory Brain , 2011, Current Biology.

[11]  Daniel Zeller,et al.  Impairment of the rubber hand illusion in focal hand dystonia. , 2011, Brain : a journal of neurology.

[12]  Mel Slater,et al.  Is my hand connected to my body? The impact of body continuity and arm alignment on the virtual hand illusion , 2011, Cognitive Neurodynamics.

[13]  Mel Slater,et al.  The Sense of Embodiment in Virtual Reality , 2012, PRESENCE: Teleoperators and Virtual Environments.

[14]  Maria V. Sanchez-Vives,et al.  Extending Body Space in Immersive Virtual Reality: A Very Long Arm Illusion , 2012, PloS one.

[15]  Alisa Mandrigin,et al.  Bodily ownership and self-location: Components of bodily self-consciousness , 2013, Consciousness and Cognition.

[16]  Tabitha C. Peck,et al.  A threat to a virtual hand elicits motor cortex activation , 2014, Experimental Brain Research.

[17]  Tabitha C. Peck,et al.  Putting yourself in the skin of a black avatar reduces implicit racial bias , 2013, Consciousness and Cognition.

[18]  M. Slater,et al.  The building blocks of the full body ownership illusion , 2013, Front. Hum. Neurosci..

[19]  M. Slater,et al.  Illusory ownership of a virtual child body causes overestimation of object sizes and implicit attitude changes , 2013, Proceedings of the National Academy of Sciences.

[20]  A. Maravita,et al.  Arousal responses to noxious stimuli in somatoparaphrenia and anosognosia: clues to body awareness. , 2014, Brain : a journal of neurology.

[21]  M. Slater,et al.  Measuring the Effects through Time of the Influence of Visuomotor and Visuotactile Synchronous Stimulation on a Virtual Body Ownership Illusion , 2014, Perception.

[22]  Michele Scandola,et al.  Rubber hand illusion induced by touching the face ipsilaterally to a deprived hand: evidence for plastic “somatotopic” remapping in tetraplegics , 2014, Front. Hum. Neurosci..

[23]  Emmanuele Tidoni,et al.  Rubber hand illusion highlights massive visual capture and sensorimotor face-hand remapping in a tetraplegic man. , 2014, Restorative neurology and neuroscience.

[24]  Antoine Lutti,et al.  The extrastriate body area is involved in illusory limb ownership , 2014, NeuroImage.

[25]  Bram Vervliet,et al.  Beyond extinction: Habituation eliminates conditioned skin conductance across contexts. , 2015, International journal of psychophysiology : official journal of the International Organization of Psychophysiology.

[26]  Marc Erich Latoschik,et al.  Avatar anthropomorphism and illusion of body ownership in VR , 2015, 2015 IEEE Virtual Reality (VR).

[27]  Turgay Aslandere,et al.  Virtual hand-button interaction in a generic virtual reality flight simulator , 2015, 2015 IEEE Aerospace Conference.

[28]  Felix Blankenburg,et al.  Network activity underlying the illusory self‐attribution of a dummy arm , 2015, Human brain mapping.

[29]  Salvatore Maria Aglioti,et al.  Body visual discontinuity affects feeling of ownership and skin conductance responses , 2015, Scientific Reports.

[30]  Konrad Paul Kording,et al.  Over my fake body: body ownership illusions for studying the multisensory basis of own-body perception , 2015, Front. Hum. Neurosci..

[31]  Joan López-Moliner,et al.  The Effects of Visuomotor Calibration to the Perceived Space and Body, through Embodiment in Immersive Virtual Reality , 2015, TAP.

[32]  S. M. Aglioti,et al.  Mere observation of body discontinuity affects perceived ownership and vicarious agency over a virtual hand , 2015, Experimental Brain Research.

[33]  F. Garbarini,et al.  Are Movements Necessary for the Sense of Body Ownership? Evidence from the Rubber Hand Illusion in Pure Hemiplegic Patients , 2015, PLoS ONE.

[34]  Karl J. Friston,et al.  Dynamic causal modeling of touch-evoked potentials in the rubber hand illusion , 2016, NeuroImage.

[35]  Felix Blankenburg,et al.  That's not quite me: limb ownership encoding in the brain. , 2016, Social cognitive and affective neuroscience.

[36]  Ferran Argelaguet,et al.  The role of interaction in virtual embodiment: Effects of the virtual hand representation , 2016, 2016 IEEE Virtual Reality (VR).

[37]  Takuji Narumi,et al.  Metamorphosis Hand: Dynamically Transforming Hands , 2016, AH.

[38]  Sophie Jörg,et al.  The effect of realism on the virtual hand illusion , 2016, 2016 IEEE Virtual Reality (VR).

[39]  Francesca Garbarini,et al.  Decreased motor cortex excitability mirrors own hand disembodiment during the rubber hand illusion , 2016, eLife.

[40]  Sophie Jörg,et al.  Need a hand?: how appearance affects the virtual hand illusion , 2016, SAP.

[41]  H. Ehrsson,et al.  Body ownership determines the attenuation of self-generated tactile sensations , 2017, Proceedings of the National Academy of Sciences.

[42]  Hiroki Higa,et al.  An attempt to control a 3D object in medical training system using leap motion , 2017, 2017 International Conference on Intelligent Informatics and Biomedical Sciences (ICIIBMS).

[43]  Niels Henze,et al.  "These are not my hands!": Effect of Gender on the Perception of Avatar Hands in Virtual Reality , 2017, CHI.

[44]  A. Berti,et al.  Movements and body ownership: Evidence from the rubber hand illusion after mechanical limb immobilization , 2017, Neuropsychologia.

[45]  Jörg Müller,et al.  Extending the Body for Interaction with Reality , 2017, CHI.

[46]  JungHyun Han,et al.  Effects of virtual arm representations on interaction in virtual environments , 2017, VRST.

[47]  Carlotta Fossataro,et al.  Losing my hand. Body ownership attenuation after virtual lesion of the primary motor cortex , 2018, The European journal of neuroscience.

[48]  Tabitha C. Peck,et al.  Avatar Embodiment. Towards a Standardized Questionnaire , 2018, Front. Robot. AI.

[49]  M Slater,et al.  Offenders become the victim in virtual reality: impact of changing perspective in domestic violence , 2018, Scientific Reports.

[50]  Anthony Steed,et al.  A Comparison of Virtual and Physical Training Transfer of Bimanual Assembly Tasks , 2018, IEEE Transactions on Visualization and Computer Graphics.

[51]  Niels Henze,et al.  Physical Keyboards in Virtual Reality: Analysis of Typing Performance and Effects of Avatar Hands , 2018, CHI.

[52]  Arran T Reader,et al.  Weakening the subjective sensation of own hand ownership does not interfere with rapid finger movements , 2019, PloS one.

[53]  Kasper Hornbæk,et al.  Tool Extension in Human-Computer Interaction , 2019, CHI.

[54]  Gavin Sim,et al.  A Virtual Reality Platform for Analyzing Remote Archaeological Sites , 2019, Interacting with computers.

[55]  Felix Darvas,et al.  Direct Electrophysiological Correlates of Body Ownership in Human Cerebral Cortex , 2018, Cerebral cortex.

[56]  Mel Slater,et al.  Body ownership increases the interference between observed and executed movements , 2019, PloS one.

[57]  Owen T. Carmichael,et al.  Brain functional differences in visuo-motor task adaptation between dominant and non-dominant hand training , 2019, Experimental Brain Research.

[58]  Gonzalo G. de Polavieja,et al.  Active control as evidence in favor of sense of ownership in the moving Virtual Hand Illusion , 2019, Consciousness and Cognition.

[59]  Mel Slater,et al.  Decreasing Pain Ratings in Chronic Arm Pain Through Changing a Virtual Body: Different Strategies for Different Pain Types. , 2019, The journal of pain : official journal of the American Pain Society.

[60]  Mar Gonzalez-Franco,et al.  The Self-Avatar Follower Effect in Virtual Reality , 2020, 2020 IEEE Conference on Virtual Reality and 3D User Interfaces (VR).

[61]  Jörg Müller,et al.  User Representations in Human-Computer Interaction , 2020, Hum. Comput. Interact..