Premium
Repetition priming effects dissociate between miniature eye movements and induced gamma‐band responses in the human electroencephalogram
Author(s) -
Hassler Uwe,
Friese Uwe,
Martens Ulla,
TrujilloBarreto Nelson,
Gruber Thomas
Publication year - 2013
Publication title -
european journal of neuroscience
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.346
H-Index - 206
eISSN - 1460-9568
pISSN - 0953-816X
DOI - 10.1111/ejn.12244
Subject(s) - magnetoencephalography , electroencephalography , psychology , stimulus (psychology) , neuroscience , functional magnetic resonance imaging , photic stimulation , perception , brain activity and meditation , eye movement , repetition priming , visual perception , cognitive psychology , cognition , lexical decision task
The role of induced gamma‐band responses (i GBR s) in the human electroencephalogram ( EEG ) is a controversial topic. On the one hand, i GBR s have been associated with neuronal activity reflecting the (re‐)activation of cortical object representations. On the other hand, it was shown that miniature saccades ( MS s) lead to high‐frequency artifacts in the EEG that can mimic cortical i GBR s. We recorded EEG and eye movements simultaneously while participants were engaged in a combined repetition priming and object recognition experiment. MS rates were mainly modulated by object familiarity in a time window from 100 to 300 ms after stimulus onset. In contrast, artifact‐corrected i GBR s were sensitive to object repetition and object familiarity in a prolonged time window. EEG source analyses revealed that stimulus repetitions modulated i GBR s in temporal and occipital cortex regions while familiarity was associated with activity in parieto‐occipital regions. These results are in line with neuroimaging studies employing functional magnetic resonance imaging or magnetoencephalography. We conclude that MS s reflect early mechanisms of visual perception while i GBR s mirror the activation of cortical networks representing a perceived object.