Sensory and motor contents are prioritized dynamically in working memory
Fig 3
The lateralized alpha and mu/beta modulation time courses do not co-evolve in lockstep.
(a) Average alpha (8−12 Hz) activity difference between contralateral and ipsilateral sensors to the cued location (burgundy) and average mu/beta (8−30 Hz) activity difference between contralateral and ipsilateral sensors to the cued action (green) scaled to range between −1 (minimum) and 1 (maximum) per participant (N = 30). Horizontal grey lines depict time points that were significantly different between the normalized alpha and mu/beta modulation time courses in a participant-wise cluster-based permutation test. Shaded areas represent the SEM. The vertical dotted lines represent (from left to right) the offset (0.2 s) of the retro-cue and the time of probe appearance in early trials (1.2 s). (b) Schematic representation of the average visual and motor shift time calculation procedure. For each participant, we calculated the minimum and maximum points of alpha and mu/beta modulation and estimated the average zero-crossing time (shift time; see “Materials and methods”). (c) Violin plots depicting the distribution of visual (top) and motor (bottom) average shift times across participants. Colored lines represent individual participant mean values, the white line inside the grey box represents the mean, and the edges of the grey box represent the first (left) and third (right) quartiles. Statistical significance is depicted with asterisks (***p < .001). (d) Violin plot depicting the difference between average motor and visual shift time for each participant (colored dots). The data in this figure can be found in OSF under data/eeg/trf [52]. The numerical values of the visual and motor shift times and their difference can be found in S3 Data.