Spatial aspects of bodily self-consciousness |
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| Authors: | Bigna Lenggenhager Michael Mouthon Olaf Blanke |
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| Institution: | 1. Laboratory of Cognitive Neuroscience, Ecole Polytechnique Fédérale de Lausanne (EPFL), Swiss Federal Institute of Technology, Brain-Mind Institute, Station 15, 1015 Lausanne, Switzerland;2. Department of Neurology, University Hospital, Geneva, Switzerland;1. Laboratory of Cognitive Neuroscience, Brain Mind Institute, School of Life Sciences, Ecole Polytéchnique Fédérale de Lausanne, AAB 1 113 (Batiment AAB), Station 19, CH-1015 Lausanne, Switzerland;2. Center for Neuroprosthetics, School of Life Sciences, Ecole Polytéchnique Fédérale de Lausanne, Lausanne, Switzerland;3. Laboratory of Electromagnectics and Acoustics, Institute of Electrical Engineering, School of Engineering, Ecole Polytéchnique Fédérale de Lausanne, Lausanne, Switzerland;4. Department of Neurology, University Hospital, Geneva, Switzerland;5. Department of Psychology, Alma Mater Studiorum, University of Bologna, Bologna, Italy;1. Laboratory of Cognitive Neuroscience, Brain Mind Institute, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;2. Center for Neuroprosthetics, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;3. Consciousness Lab, Institute of Psychology, Jagiellonian University, Cracow, Poland;4. Neurosurgery Division, Department of Clinical Neurosciences, Geneva University Hospitals, Geneva, Switzerland;5. Neurology Division, Department of Clinical Neurosciences, Geneva University Hospitals, Geneva, Switzerland;1. Center for Subjectivity Research, University of Copenhagen, Denmark;2. Department of Psychological Sciences, Birkbeck, University of London, United Kingdom;1. Department of Neurology, Rouen University Hospital, France;2. Clinical, Educational & Health Psychology Research Department, Division of Psychology & Language Sciences, University College London, UK;3. Academic Unit of Neuropsychiatry, King''s College London, UK;4. School of Life and Medical Sciences, University of Hertfordshire, UK;1. Center for Neuroprosthetics, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;2. Laboratory of Cognitive Neuroscience, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland;3. Gonda Multidisciplinary Brain Research Center, Bar-Ilan University, Ramat-Gan, Israel;4. Vanderbilt Brain Institute, Vanderbilt University, Nashville, USA;5. Consciousness Lab, Institute of Psychology, Jagiellonian University, Cracow, Poland;6. Centre d''Economie de la Sorbonne, CNRS UMR 8174, Paris, France;7. Philosophisches Seminar/Gutenberg Research College, Johannes Gutenberg-Universität, Mainz, Germany;8. Frankfurt Institute for Advanced Studies, Frankfurt, Germany;9. Department of Neurology, University Hospital, Geneva 1211, Switzerland;1. Laboratory of Cognitive Neuroscience, Centre for Neuroprosthetics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland;2. Department of Psychology, Alma Mater Studiorum, University of Bologna, 40100 Bologna, Italy |
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| Abstract: | Visual, somatosensory, and perspectival cues normally provide congruent information about where the self is experienced. Separating those cues by virtual reality techniques, recent studies found that self-location was systematically biased to where a visual–tactile event was seen. Here we developed a novel, repeatable and implicit measure of self-location to compare and extend previous protocols. We investigated illusory self-location and associated phenomenological aspects in a lying body position that facilitates clinically observed abnormal self-location (as on out-of-body experiences). The results confirm that the self is located to where touch is seen. This leads to either predictable lowering or elevation of self-localization, and the latter was accompanied by sensations of floating, as during out-of-body experiences. Using a novel measurement we show that the unitary and localized character of the self can be experimentally separated from both the origin of the visual perspective and the location of the seen body, which is compatible with clinical data. |
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