Figure 4.

Plots of the activity of components 2 and 4 (relating to the ICA decomposition of Fig. 1b), and of the temporal derivatives of the movement parameters along x and z (bottom) during the same interval (720 seconds). Note that the EEG activity was sampled before the first volume of the EPI was acquired so that any interictal activity preceding the first volume could still be used for general linear model purposes. The units on the y‐axis of the movement plots, and the component time courses are set such that they allow easy visual inspection (each of the curves was normalized so their maximum amplitude is equal to 1). Vertical dashed gray lines represent time points where there is a clear correlation between subject movement and the activity of the selected components.