Spectrograms of the EEG after decapitation.

<p>Mean spectrograms of the EEGs for the baseline period, i.e. the 10 seconds before decapitation, and for 5 time points post decapitation. Data are in Volt, group means are given. On the raw mean spectrum 2nd order smoothing with 4 neighbors was applied. On the abscissa the data around 50 Hz are deleted due to the notch filter. Please note the log scale of the ordinate. In anesthesia, before decapitation the EEG has high power content, reflecting the bursts in the burst suppression pattern. Following decapitation in both groups, a fast and global decay of the power is observed. The quantification of this decay is shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0016514#pone-0016514-g003" target="_blank">fig. 3</a>.