title: Plasticity in unimodal and multimodal brain areas reflects multisensory changes in self-face identification.
abstract: Nothing provides as strong a sense of self as seeing one's face. Nevertheless, it remains unknown how the brain processes the sense of self during the multisensory experience of looking at one's face in a mirror. Synchronized visuo-tactile stimulation on one's own and another's face, an experience that is akin to looking in the mirror but seeing another's face, causes the illusory experience of ownership over the other person's face and changes in self-recognition. Here, we investigate the neural correlates of this enfacement illusion using fMRI. We examine activity in the human brain as participants experience tactile stimulation delivered to their face, while observing either temporally synchronous or asynchronous tactile stimulation delivered to another's face on either a specularly congruent or incongruent location. Activity in the multisensory right temporo-parietal junction, intraparietal sulcus, and the unimodal inferior occipital gyrus showed an interaction between the synchronicity and the congruency of the stimulation and varied with the self-reported strength of the illusory experience, which was recorded after each stimulation block. Our results highlight the important interplay between unimodal and multimodal information processing for self-face recognition, and elucidate the neurobiological basis for the plasticity required for identifying with our continuously changing visual appearance.
authors: Nuffield Department of Clinical Neuroscience, John Radcliffe Hospital, University of Oxford, Oxford OX3 9DU, UK, Lab of Action and Body, Department of Psychology, Royal Holloway, University of London, Egham TW20 0EX, UK.
authors: Matthew A J
authors: MA
authors: Apps
authors: UCL Interaction Center (UCLIC), University College London, London WC1E 6BT, UK.
authors: Ana
authors: A
authors: Tajadura-Jiménez
authors: Department of Psychological Science, Birkbeck, University of London, WC1H 0DS, UK.
authors: Marty
authors: M
authors: Sereno
authors: Center for Neuroprosthetics and Brain-Mind Institute, Ecole Polytechnique Fédérale de Lausanne, SV 2805, Switzerland.
authors: Olaf
authors: O
authors: Blanke
authors: Lab of Action and Body, Department of Psychology, Royal Holloway, University of London, Egham TW20 0EX, UK.
authors: Manos
authors: M
authors: Tsakiris
mesh_terms: D000328:Adult; D001921:Brain / Q000502:physiology*; D001931:Brain Mapping; D005145:Face; D005260:Female; D006801:Humans; D007088:Illusions / Q000502:physiology; D008279:Magnetic Resonance Imaging; D009473:Neuronal Plasticity; D010812:Physical Stimulation; D021641:Recognition, Psychology / Q000502:physiology*; D012649:Self Concept; D055698:Touch Perception / Q000502:physiology*; D014796:Visual Perception / Q000502:physiology*; D055815:Young Adult
keywords: enfacement; fMRI; face recognition; multisensory; self-recognition
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