Modulations of ongoing alpha oscillations predict successful short-term visual memory encoding.

Frontiers in Human Neuroscience
Rodolphe NenertKristina M Visscher

Abstract

Alpha-frequency band oscillations have been shown to be one of the most prominent aspects of neuronal ongoing oscillatory activity, as reflected by electroencephalography (EEG) recordings. First thought to reflect an idling state, a recent framework indicates that alpha power reflects cortical inhibition. In the present study, the role of oscillations in the upper alpha-band (12 Hz) was investigated during a change-detection test of short-term visual memory. If alpha oscillations arise from a purely inhibitory process, higher alpha power before sample stimulus presentation would be expected to correlate with poorer performance. Instead, participants with faster reaction-times showed stronger alpha power before the sample stimulus in frontal and posterior regions. Additionally, faster participants showed stronger alpha desynchronization after the stimulus in a group of right frontal and left posterior electrodes. The same pattern of electrodes showed stronger alpha with higher working-memory load, so that when more items were processed, alpha power desynchronized faster after the stimulus. During memory maintenance, alpha power was greater when more items were held in memory, likely due to a faster resynchronization. These data ...Continue Reading

Citations

May 3, 2015·Epilepsy & Behavior : E&B·A M GregoryJ P Szaflarski
Oct 23, 2012·Neuropsychologia·Brooke M RobertsCharan Ranganath
May 23, 2015·Frontiers in Behavioral Neuroscience·Mara KottlowThomas Koenig
Apr 16, 2013·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Mehran AhmadlouFiroozeh Sajedi
Oct 2, 2014·PloS One·Rodolphe NenertJerzy P Szaflarski
Feb 22, 2017·Psychophysiology·Alberto J González-Villar, Maria T Carrillo-de-la-Peña
Oct 19, 2017·The European Journal of Neuroscience·Michael S ClaytonRoi Cohen Kadosh
Nov 14, 2019·Journal of Neurophysiology·Quentin MoreauMatteo Candidi
Feb 17, 2021·Neuropsychologia·Josephine CruzatSalvador Soto-Faraco

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