Fig. 2From: Frequency analysis of electroencephalogram recorded from a bottlenose dolphin (Tursiops truncatus) with a novel method during transportation by trucka Typical pulse profile of recorded-EEG (R-EEG) of dolphin when quiet (recording No. 2 in Table 1); b pulse profile of R-EEG that was a manually removed pulse of ECG from pulse of R-EEG in (a); c pulse of true-EEG (EEG) in which other artifact pulses were removed from the pulse of ECG-removed R-EEG in (b) by a band-pass filter; d the power spectrum resulting from frequency analysis of the EEG (c) by Fast Fourier Transform at recording positions h–k in Fig. 1bBack to article page