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

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Authors

ŠTILLOVÁ Klára JURÁK P. CHLÁDEK J. HALÁMEK J. TELECKÁ Sabina REKTOR Ivan

Year of publication 2013
Type Article in Periodical
Magazine / Source Journal of Neural Transmission
MU Faculty or unit

Central European Institute of Technology

Citation
Web http://www.ncbi.nlm.nih.gov/pubmed/22968598
Doi http://dx.doi.org/10.1007/s00702-012-0890-z
Field Neurology, neurosurgery, neurosciences
Keywords Event-related potential (ERP); Memory; Posterior medial cortex (PMC); SEEG
Description 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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