a, b, Group-averaged distributed linear source estimations were calculated over the 291–357 ms poststimulus period for each experimental condition (scale indicated). Results are rendered on the average MNI brain. Axial slice shows the activation for each of the two conditions in correspondence to the maximal t value at −53, −3, 40 mm. c, Results of the statistical contrast of the source estimations between AEPs to human and animal vocalization are displayed in the same manner as in a and b.