Effects of mnemonic load on cortical activity during visual working memory: Linking ongoing brain activity with evoked responses
Tjeerd W Boonstra, Tamara Y Powell, Saeid Mehrkanoon, Michael Breakspear
INTERNATIONAL JOURNAL OF PSYCHOPHYSIOLOGY | ELSEVIER SCIENCE BV | Published : 2013
The mechanisms generating task-locked changes in cortical potentials remain poorly understood, despite a wealth of research. It has recently been proposed that ongoing brain oscillations are not symmetric, so that task-related amplitude modulations generate a baseline shift that does not average out, leading to slow event-related potentials. We test this hypothesis using multivariate methods to formally assess the co-variation between task-related evoked potentials and spectral changes in scalp EEG during a visual working memory task, which is known to elicit both evoked and sustained cortical activities across broadly distributed cortical regions. 64-channel EEG data were acquired from eigh..View full abstract
Awarded by ARC Thinking Systems grant
Awarded by BrainNRG collaborative award
Awarded by Netherlands Organization for Scientific Research (NWO)
This research was supported by the ARC Thinking Systems grant TS0669860; the National Health and Medical Research Council; BrainNRG collaborative award JSMF22002082, and the Netherlands Organization for Scientific Research (NWO #45110-030).