Fig. 2: Memory performance and the degree of cross-regional phase synchronisation in each phase offset condition. | Communications Psychology

Fig. 2: Memory performance and the degree of cross-regional phase synchronisation in each phase offset condition.

From: Pre-stimulus alpha power modulates trial-by-trial variability in theta rhythmic multisensory entrainment strength and theta-induced memory effect

Fig. 2: Memory performance and the degree of cross-regional phase synchronisation in each phase offset condition.

A source localisation of evoked 4 Hz power in the unimodal conditions. Top, visual source, MNI coordinates of ROI: −4, −85, −25. Middle, left auditory source, MNI coordinates of ROI: −54, −15, 34. Bottom, right auditory source, MNI coordinates of ROI: 59, −40, 9. Evoked power at source space was averaged between 3.5 and 4.5 Hz and between 0.75 and 2.75 s in the unimodal visual and auditory conditions. The values were normalised by the averaged evoked power of 0.5 s pre-stimulus baseline starting from 1 s before stimulus onset. B Associative memory task performance. Proportion of the correctly selected movie scenes that were associated with presented sounds in each phase offset condition. Individual data for each condition is shown in dots connected by grey lines (25 participants, including one who did not complete the unimodal conditions). C Phase differences between auditory and visual sources in each phase offset condition. In each phase offset condition, amplitude-normalised grand average ERF signals at the auditory source are in blue. Signals at the visual source are in red. Circular histograms of instantaneous phase differences between visual and auditory sources, and between 1 and 2 s (shaded time window on the ERFs) are plotted on unit circles, in 16 equally-sized bins.

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