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The posterior medial cortex is involved in visual but not in verbal memory encoding processing: an intracerebral recording study

Abstract

The objective is to study the involvement of the posterior medial cortex (PMC) in encoding and retrieval by visual and auditory memory processing. Intracerebral recordings were studied in two epilepsy-surgery candidates with depth electrodes implanted in the retrosplenial cingulate, precuneus, cuneus, lingual gyrus and hippocampus. We recorded the event-related potentials (ERP) evoked by visual and auditory memory encoding–retrieval tasks. In the hippocampus, ERP were elicited in the encoding and retrieval phases in the two modalities. In the PMC, ERP were recorded in both the encoding and the retrieval visual tasks; in the auditory modality, they were recorded in the retrieval task, but not in the encoding task. In conclusion, the PMC is modality dependent in memory processing. ERP is elicited by memory retrieval, but it is not elicited by auditory encoding memory processing in the PMC. The PMC appears to be involved not only in higher-order top-down cognitive activities but also in more basic, rather than bottom-up activities.

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Acknowledgments

This work was supported by research project CEITEC MU-Central European Institute of Technology Masaryk University. The technical part of the study was also supported by projects: GA GACR P103/11/0933 and Application laboratories of advanced micro technologies and nanotechnologies, CZ.1.05/2.1.00/01.0017, co-funded by the Operational Programme ‘Research and Development for Innovations’, the European regional development fund and state budget.

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Correspondence to I. Rektor.

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Štillová, K., Jurák, P., Chládek, J. et al. The posterior medial cortex is involved in visual but not in verbal memory encoding processing: an intracerebral recording study. J Neural Transm 120, 391–397 (2013). https://doi.org/10.1007/s00702-012-0890-z

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  • DOI: https://doi.org/10.1007/s00702-012-0890-z

Keywords

  • Event-related potential (ERP)
  • Memory
  • Posterior medial cortex (PMC)
  • SEEG