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Silvio Ionta1, Roberto Martuzzi1, Roy Salomon1

  • 1Center for Neuroprosthetics, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; Laboratory of Cognitive Neuroscience, Brain-Mind Institute, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; and Department of Neurology, University Hospital, 1211 Geneva, Switzerland Center for Neuroprosthetics, School of Life Sciences, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; Laboratory of Cognitive Neuroscience, Brain-Mind Institute, School of Life Sciences, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; and Department of Neurology, University Hospital, 1211 Geneva, Switzerland.

Social Cognitive and Affective Neuroscience
|January 8, 2014
PubMed
Summary

Bodily self-consciousness involves brain networks. This study reveals that while both left and right temporoparietal junction (TPJ) are connected, the right TPJ plays a dominant role in processing self-location and first-person perspective.

Keywords:
first-person perspectiveinsulamultisensory integrationself-locationtemporoparietal junction

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • Bodily self-consciousness relies on processing self-location and first-person perspective.
  • The temporoparietal junction (TPJ) is crucial for these aspects, with bilateral activity in healthy subjects but deficits linked to right TPJ damage.

Purpose of the Study:

  • To clarify the interplay between brain regions involved in self-location and first-person perspective.
  • To identify the neural network mediating bodily self-consciousness.
  • To understand the role of hemispheric specialization in encoding self-location and first-person perspective.

Main Methods:

  • Functional connectivity analysis was employed.
  • The study examined connections between the right and left TPJ and other brain regions.
  • Hemispheric differences in connectivity were investigated.

Main Results:

  • Both right and left TPJ showed bilateral connections with the supplementary motor area, ventral premotor cortex, insula, intraparietal sulcus, and occipitotemporal cortex.
  • Functional connectivity between the right TPJ and right insula was highly selective for changes in self-location and first-person perspective.
  • Hemispheric differences were observed, with specific connectivity patterns modulated by self-location and first-person perspective in right and left TPJ networks.

Conclusions:

  • A bilateral network supports bodily self-consciousness.
  • The findings suggest a right-hemispheric dominance within this network for processing self-location and first-person perspective.
  • These results integrate findings from healthy populations and clinical observations in neurological deficits.