Sensory and motor contents are prioritized dynamically in working memory
Fig 2
Lateralized frequency-specific EEG activity locked to cue onset.
(a) Contrast between EEG time–frequency activity contralateral vs. ipsilateral to the cued bar location in occipital sensors (PO7/PO8) divided by summed contralateral and ipsilateral activity (expressed as a percentage) in informative trials vs. noninformative trials. (b) Contrast between EEG time–frequency activity contralateral vs. ipsilateral to the cued prospective action in central sensors (C3/C4) divided by summed contralateral and ipsilateral activity (expressed as a percentage) in informative trials vs. noninformative trials. (c, d) Cross-participant average alpha (8−12 Hz; c) and mu/beta (8−30 Hz; d) activity difference between contralateral and ipsilateral sensors to the cued location and action, respectively, in informative trials. Topographies represent the average frequency-specific activity in contra-vs-ipsi contrasts in informative trials across all sensor pairs during the time-windows which correspond to the alpha clusters in panel c or mu/beta clusters in panel d, respectively. Black outline in time–frequency spectra (a, b) indicates statistically significant clusters. Shaded areas represent the SEM and cluster-permutation corrected significant time points are indicated with horizontal lines in c and d (N = 30). The first part of the time–frequency spectra in panels a and b and of the time course in c and d (−0.2–1.2 s) corresponds to the average of short and long trials, and the second part (1.2–3.2 s) corresponds to long trials only. The vertical dotted lines represent (from left to right) the onset (0 s) and offset (0.2 s) of the retro-cue and the time of probe appearance in early trials (1.2 s). The data in this figure can be found in OSF under data/eeg/trf [52].