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Brain imaging and a body-swop illusion show separate brain networks are key for body ownership and self-location. The posterior cingulate cortex acts as a bridge between these crucial networks.

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Area of Science:

  • Neuroscience
  • Cognitive Neuroscience
  • Neuroimaging

Background:

  • The sense of body ownership and self-location are fundamental aspects of human consciousness.
  • Understanding the neural underpinnings of these self-related experiences is a key challenge in neuroscience.

Purpose of the Study:

  • To investigate the distinct neural networks involved in constructing the sense of body ownership and self-location.
  • To explore the role of the posterior cingulate cortex in integrating these spatial and bodily representations.

Main Methods:

  • Utilized functional magnetic resonance imaging (fMRI) during a novel 'body-swop' illusion.
  • Employed advanced neuroimaging analysis techniques to identify task-related brain activity.

Main Results:

  • Identified distinct neural networks: a parietal-premotor network associated with body ownership and a parietal-hippocampal network linked to self-location.
  • Demonstrated that the posterior cingulate cortex (PCC) plays a crucial mediating role between these two networks.

Conclusions:

  • The sense of body ownership and self-location are supported by dissociable, yet interconnected, large-scale brain networks.
  • The posterior cingulate cortex is a critical hub for integrating multisensory information to maintain a coherent sense of self in space.