Science, Space and Technology News 2024
Researchers from the Korea Institute of Science and Technology and the Swiss Federal Institute of Technology Lausanne have successfully induced self-location illusions using multisensory virtual reality in an MRI scanner, observing changes in the brain’s grid cell activity. This study demonstrates that cognitive changes in perceived location can activate grid cells without visual cues or physical movement.
) functions that allow us to recognize where we are. While traveling to a specific place, the GPS cells along the way fire in turn, depending on their location, and these cells play an important role in recognizing our location in the form of coordinates and remembering events in space. To observe grid cell activity during the illusory self-location changes, the researchers combined MRI-compatible VR technology with multisensory bodily stimulation to induce the illusion, which was precisely controlled in various directions as designed.
This is the first clinical study to demonstrate that multisensory bodily stimuli alone can evoke grid cell activities, without any kind of navigation and without change in the visual perspective. It shows that GPS coordinates in the human brain respond not only to the physical location of the body but also to location information based on various cognitive activities and experiences, raising the possibility of objective diagnosis of hallucinatory symptoms through brain image analysis.
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