Abstract：
:Many studies have now consistently reported that the phase angle of ongoing oscillatory activity (measured using EEG/MEG), at time of stimulus presentation influences detection when stimuli are near-threshold. However, studies examining whether the adjustment of the phase angle of oscillations is under top-down attentional control have thus far yielded conflicting results. A possible source for the discrepancy could be that the estimation of the phase of ongoing oscillations as well as its uniformity across trials could be affected by task induced changes in the power of oscillations or concurrent evoked responses. One measure, Inter-Trial Phase-Locking (ITPC), or the uniformity of phase angles across trials, is particularly vulnerable to these factors. Here, using various simulations modelling the common task induced changes in the EEG reported in the literature, we demonstrate that apparent changes in Inter-Trial Phase-Locking of oscillatory activity can occur independent of any actual change in the phase of the ongoing activity.
journal_name
Sci Repjournal_title
Scientific reportsauthors
van Diepen RM,Mazaheri Adoi
10.1038/s41598-018-20423-zsubject
Has Abstractpub_date
2018-02-14 00:00:00pages
2990issue
1issn
2045-2322pii
10.1038/s41598-018-20423-zjournal_volume
8pub_type
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