Figure 2.

An intracranial recording from the cortex of an epileptic patient under propofol general anesthesia. The burst in channel 32 starts hundreds of milliseconds before the bursts in channels 36 and 34, demonstrating that burst onset is heterogeneous across the cortex. The signal was low-passed filtered at 100 Hz and resampled to 250 Hz. From (Lewis et al., 2013).