The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization

Our constant eye movements mean that updating processes, such as saccadic remapping, are essential for the maintenance of a stable spatial representation of the world around us. It has been proposed that, rather than continually update a full spatiotopic map, only the location of a few key objects i...

Full description

Bibliographic Details
Main Authors:	McLelland, Douglas, Lavergne, Louisa, VanRullen, Rufin
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4941415/

id	pubmed-4941415
recordtype	oai_dc
spelling	pubmed-49414152016-07-20 The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization McLelland, Douglas Lavergne, Louisa VanRullen, Rufin Article Our constant eye movements mean that updating processes, such as saccadic remapping, are essential for the maintenance of a stable spatial representation of the world around us. It has been proposed that, rather than continually update a full spatiotopic map, only the location of a few key objects is updated, suggesting that the process is linked to attention. At the same time, mounting evidence links attention to oscillatory neuronal processes. We therefore hypothesized that updating processes should themselves show oscillatory characteristics, inherited from underlying attentional processes. To test this, we carried out a combined psychophysics and EEG experiment in human participants, using a saccadic mislocalization task as a behaviourally measureable proxy for spatial updating, and simultaneously recording 64-channel EEG. We then used a time-frequency analysis to test for a correlation between oscillation phase and perceptual outcome. We found a significant phase-dependence of mislocalization in a time-frequency region from around 400 ms prior to saccade initiation and peaking at around 7 Hz, principally apparent over occipital electrodes. Thus the degree of perceived mislocalization is correlated with the phase of a theta-frequency oscillation prior to saccade onset. We conclude that spatial updating processes are indeed linked to rhythmic processes in the brain. Nature Publishing Group 2016-07-11 /pmc/articles/PMC4941415/ /pubmed/27403937 http://dx.doi.org/10.1038/srep29335 Text en Copyright © 2016, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	McLelland, Douglas Lavergne, Louisa VanRullen, Rufin
spellingShingle	McLelland, Douglas Lavergne, Louisa VanRullen, Rufin The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization
author_facet	McLelland, Douglas Lavergne, Louisa VanRullen, Rufin
author_sort	McLelland, Douglas
title	The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization
title_short	The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization
title_full	The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization
title_fullStr	The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization
title_full_unstemmed	The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization
title_sort	phase of ongoing eeg oscillations predicts the amplitude of peri-saccadic mislocalization
description	Our constant eye movements mean that updating processes, such as saccadic remapping, are essential for the maintenance of a stable spatial representation of the world around us. It has been proposed that, rather than continually update a full spatiotopic map, only the location of a few key objects is updated, suggesting that the process is linked to attention. At the same time, mounting evidence links attention to oscillatory neuronal processes. We therefore hypothesized that updating processes should themselves show oscillatory characteristics, inherited from underlying attentional processes. To test this, we carried out a combined psychophysics and EEG experiment in human participants, using a saccadic mislocalization task as a behaviourally measureable proxy for spatial updating, and simultaneously recording 64-channel EEG. We then used a time-frequency analysis to test for a correlation between oscillation phase and perceptual outcome. We found a significant phase-dependence of mislocalization in a time-frequency region from around 400 ms prior to saccade initiation and peaking at around 7 Hz, principally apparent over occipital electrodes. Thus the degree of perceived mislocalization is correlated with the phase of a theta-frequency oscillation prior to saccade onset. We conclude that spatial updating processes are indeed linked to rhythmic processes in the brain.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4941415/
_version_	1613607742245699584

The phase of ongoing EEG oscillations predicts the amplitude of peri-saccadic mislocalization

Similar Items