Fellner, Marie-Christin and Baeuml, Karl-Heinz T. and Hanslmayr, Simon (2013) Brain oscillatory subsequent memory effects differ in power and long-range synchronization between semantic and survival processing. NEUROIMAGE, 79. pp. 361-370. ISSN 1053-8119,
Full text not available from this repository. (Request a copy)Abstract
Memory crucially depends on the way information is processed during encoding. Differences in processes during encoding not only lead to differences in memory performance but also rely on different brain networks. Although these assumptions are corroborated by several previous fMRI and ERP studies, little is known about how brain oscillations dissociate between different memory encoding tasks. The present study therefore compared encoding related brain oscillatory activity elicited by two very efficient encoding tasks: a typical deep semantic item feature judgment task and a more elaborative survival encoding task. Subjects were asked to judge words either for survival relevance or for animacy, as indicated by a cue presented prior to the item. This allowed dissociating pre-item activity from item-related activity for both tasks. Replicating prior studies, survival processing led to higher recognition performance than semantic processing. Successful encoding in the semantic condition was reflected by a strong decrease in alpha and beta power, whereas successful encoding in the survival condition was related to increased alpha and beta long-range phase synchrony. Moreover, a pre-item subsequent memory effect in theta power was found which did not vary with encoding condition. These results show that measures of local synchrony (power) and global long range-synchrony (phase synchronization) dissociate between memory encoding processes. Whereas semantic encoding was reflected in decreases in local synchrony, increases in global long range synchrony were related to elaborative survival encoding, presumably reflecting the involvement of a more widespread cortical network in this task. (c) 2013 Elsevier Inc. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | EPISODIC MEMORY; ADAPTIVE MEMORY; PHASE SYNCHRONIZATION; PROXIMATE MECHANISMS; TERM-MEMORY; THETA; EEG; RETRIEVAL; EVENT; GAMMA; Encoding; Levels of processing; Strategy; Adaptive memory; Long term memory; Desynchronization |
| Subjects: | 100 Philosophy & psychology > 150 Psychology |
| Divisions: | Psychology and Pedagogy > Institut für Psychologie > Lehrstuhl für Psychologie IV (Entwicklungs- und Kognitionspsychologie) - Prof. Dr. Karl-Heinz Bäuml |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 31 Mar 2020 11:28 |
| Last Modified: | 31 Mar 2020 11:28 |
| URI: | https://pred.uni-regensburg.de/id/eprint/16010 |
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