Assessing High Frequency Functional Connectivity Networks

Thomas Allan¹, Cesar Caballero-Gaudes², Matthew Brookes¹, Susan Francis¹, Penny Gowland¹

We investigate the signal fluctuations behind functional connectivity to determine what contribution high frequency signals (greater than 0.01Hz) and haemodynamic events have on functional correlations. We also consider how the number of events found during rest periods, using paradigm free mapping, changes following a task (motor and 2-back task) and how these events modulate functional networks. We show that events and high frequency oscillations are a significant contributor to network connectivity, and removing these events changes the correlation between distinct brain regions.