Fig. 4

The power spectrum profile resulting from FFT analysis on the EEG when the dolphin was quiet (a), on ECG (b), on EMG synchronized with movement of pectoral fin (c), on electrograms of breathing (d) and moving the head (e). The FFT conditions were as follows: interval, 1.024 ms; window function, hamming; overlap, none; spectrum, power and frequency resolution, 0.977 Hz; the number of FFT points, 651 (a), 418 (b), 68 (c), 387 (d), 719 (e)