Formation of visual memories controlled by gamma power phase-locked to alpha oscillations

Park, H. , Lee, D. S., Kang, E., Kang, H., Hahm, J., Kim, J. S., Chung, C. K., Jiang, H., Gross, J. and Jensen, O. (2016) Formation of visual memories controlled by gamma power phase-locked to alpha oscillations. Scientific Reports, 6, 28092. (doi: 10.1038/srep28092) (PMID:27306959) (PMCID:PMC4910116)

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Abstract

Neuronal oscillations provide a window for understanding the brain dynamics that organize the flow of information from sensory to memory areas. While it has been suggested that gamma power reflects feedforward processing and alpha oscillations feedback control, it remains unknown how these oscillations dynamically interact. Magnetoencephalography (MEG) data was acquired from healthy subjects who were cued to either remember or not remember presented pictures. Our analysis revealed that in anticipation of a picture to be remembered, alpha power decreased while the cross-frequency coupling between gamma power and alpha phase increased. A measure of directionality between alpha phase and gamma power predicted individual ability to encode memory: stronger control of alpha phase over gamma power was associated with better memory. These findings demonstrate that encoding of visual information is reflected by a state determined by the interaction between alpha and gamma activity.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Park, Dr Hyojin and Gross, Professor Joachim
Authors: Park, H., Lee, D. S., Kang, E., Kang, H., Hahm, J., Kim, J. S., Chung, C. K., Jiang, H., Gross, J., and Jensen, O.
Subjects:R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
College/School:College of Medical Veterinary and Life Sciences > Institute of Neuroscience and Psychology
Journal Name:Scientific Reports
Journal Abbr.:srep
Publisher:Nature Publishing Group
ISSN:2045-2322
ISSN (Online):2045-2322
Published Online:16 June 2016
Copyright Holders:Copyright © 2016 Park, H. et al.
First Published:First published in Scientific Reports 6:28092
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
597051Natural and modulated neural communication: State-dependent decoding and driving of human Brain Oscillations.Joachim GrossWellcome Trust (WELLCOME)098433/Z/12/ZINP - CENTRE FOR COGNITIVE NEUROIMAGING