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Embodiment in episodic memory through premotor-hippocampal coupling
oleh: Nathalie Heidi Meyer, Baptiste Gauthier, Sara Stampacchia, Juliette Boscheron, Mariana Babo-Rebelo, Jevita Potheegadoo, Bruno Herbelin, Florian Lance, Vincent Alvarez, Elizabeth Franc, Fabienne Esposito, Marilia Morais Lacerda, Olaf Blanke
Format: | Article |
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Diterbitkan: | Nature Portfolio 2024-09-01 |
Deskripsi
Abstract Episodic memory (EM) allows us to remember and relive past events and experiences and has been linked to cortical-hippocampal reinstatement of encoding activity. While EM is fundamental to establish a sense of self across time, this claim and its link to the sense of agency (SoA), based on bodily signals, has not been tested experimentally. Using real-time sensorimotor stimulation, immersive virtual reality, and fMRI we manipulated the SoA and report stronger hippocampal reinstatement for scenes encoded under preserved SoA, reflecting recall performance in a recognition task. We link SoA to EM showing that hippocampal reinstatement is coupled with reinstatement in premotor cortex, a key SoA region. We extend these findings in a severe amnesic patient whose memory lacked the normal dependency on the SoA. Premotor-hippocampal coupling in EM describes how a key aspect of the bodily self at encoding is neurally reinstated during the retrieval of past episodes, enabling a sense of self across time.