Fig. 6
From: Brain songs framework used for discovering the relevant timescale of the human brain
Timescale in HCP task data. We analysed HCP task data (see Methods) in order to compare the optimal timescale for resting state and neuroimaging during a social cognition task, where participants were presented with short video clips (20 s) of objects (squares, circles, triangles) that either interacted in some way, or moved randomly on the screen. We fitted the whole-brain model to the BOLD signal and plot the results of measuring entropy (red line) and hierarchy (blue line) in different bin sizes from 10 to 3000 ms. We found peaks in entropy and hierarchy of around 200 ms, which is very similar to the peak found in resting state fMRI. This means that the timescale for resting state and task condition is optimal at the same timepoint, suggesting that the 200 ms timescale is an intrinsic property of brain dynamics
