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Erschienen in:
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2016 | OriginalPaper | Buchkapitel

Rhinal-Hippocampal Information Flow Reverses Between Memory Encoding and Retrieval

verfasst von : Juergen Fell, Tobias Wagner, Bernhard P. Staresina, Charan Ranganath, Christian E. Elger, Nikolai Axmacher

Erschienen in: Neural Information Processing

Verlag: Springer International Publishing

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Abstract

The medial temporal lobe is crucial for the encoding and retrieval of episodic long-term memories. It is widely assumed that memory encoding is associated with information transfer from sensory regions via the rhinal cortex into the hippocampus. Retrieval of information should then be associated with transfer in the reverse direction. However, experimental evidence for this mechanism is still lacking. Here, we show in human intracranial EEG data during two independent recognition memory paradigms that rhinal-hippocampal information flow significantly changes its directionality from encoding to retrieval. Using a novel phase-based method to analyze directional coupling of oscillations, coupling values were more positive (i.e., from rhinal cortex to the hippocampus) during encoding as compared to retrieval. These effects were observed in the delta (1–3 Hz) range where rhinal-hippocampal post-stimulus phase synchronization increased most robustly across both experiments.

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Vorheriges Kapitel An Online-Updating Approach on Task Recommendation in Crowdsourcing Systems
Nächstes Kapitel Inferred Duality of Synaptic Connectivity in Local Cortical Circuit with Receptive Field Correlation
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Metadaten
Titel
Rhinal-Hippocampal Information Flow Reverses Between Memory Encoding and Retrieval
verfasst von
Juergen Fell
Tobias Wagner
Bernhard P. Staresina
Charan Ranganath
Christian E. Elger
Nikolai Axmacher
Copyright-Jahr
2016
Buch
Neural Information Processing

Print ISBN: 978-3-319-46686-6

Electronic ISBN: 978-3-319-46687-3

Copyright-Jahr: 2016

DOI
https://doi.org/10.1007/978-3-319-46687-3_11