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Manipulating bodily signals improved spatial navigation and decreased grid cell-like representations in the entorhinal cortex. This suggests sensorimotor signals influence spatial processing and brain activity during navigation.

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Area of Science:

  • Neuroscience
  • Cognitive Science
  • Spatial Navigation

Background:

  • Grid cells in the entorhinal cortex (EC) are crucial for spatial location encoding.
  • Body-derived sensorimotor signals are vital for self-perception and self-centered processing.
  • The impact of sensorimotor signals on grid cells and spatial navigation remains unclear.

Purpose of the Study:

  • To investigate how modulating self-centered processing via bodily signals affects grid cell-like representations (GCLR) and spatial navigation performance in humans.
  • To explore the neural correlates of these effects using functional magnetic resonance imaging (fMRI).

Main Methods:

  • Online manipulation of bodily signals to alter self-centered processing.
  • A spatial navigation task was employed.
  • fMRI was used to measure brain activity and detect GCLR in the EC.

Main Results:

  • Participants showed improved spatial navigation performance.
  • A decrease in GCLR was observed in the EC.
  • Increased activity in the retrosplenial cortex correlated with enhanced navigation performance.

Conclusions:

  • Bodily signals and self-centered processing significantly influence spatial navigation and entorhinal cortex activity.
  • The findings link sensorimotor integration to spatial cognition and highlight the role of the retrosplenial cortex in navigation.
  • This research provides insights into neural mechanisms underlying spatial awareness and navigation, particularly in virtual reality (VR) environments.