Figure 1.
Electrode placements and 20 s of typical EEG tracings for each channel.
The intersection of the three dashed lines in bold in the frog head denotes the intersection of suture lines corresponding to lambda.
Figure 2.
Means and standard errors of relative EEG power spectra.
The four rows are for delta (A, B), theta (C, D), alpha (E, F) and beta (G, H) EEG bands, respectively; while the two columns are for the non-reproductive stage (left) and the reproductive stage (right), respectively. Filled stars or open triangles denote that there were significant or marginally significant differences between the corresponding electrode pairs during playback of a given acoustic stimulus (p<0.05 for filled stars and 0.05<p<0.1 for open triangles), open stars denote that there were significant differences between the corresponding acoustic stimuli for a given channel (p<0.05), while asterisks denote that relative EEG power for the mesencephalon (PR3 and PR4) were significantly higher than that for the left telencephalon (PR1) (p<0.05). PR1, PR2, PR3 and PR4, the four electrode pairs; WN, white noise; HSA, high sexual attractive call; LSA, low sexual attractive call.
Figure 3.
Time-frequency maps of grand mean EEG waveforms across subjects.
The four subplots are for the left (A) and right (B) telencephalon, the left (C) and right (D) mesencephalon, respectively. For each subplot, the two rows are for the non-reproductive stage (upper) and the reproductive stage (lower), respectively; while the four columns are for the four stimuli, i.e. silence, white noise, low sexual attractive call and high sexual attractive call. Only the data from −200 to 2700 ms for each stimulus onset are shown in the figure. The pink vertical dotted line denotes the onset of a given stimulus. ERSP, event-related spectral perturbation.
Table 1.
Results of simple effect analysis for the factors “channel” and “stimulus”.