Figure 1.
(a) Tone sequences for the standard and the deviant stimuli that were used in the MEG measurements before and after training. (b) Musical score of the training piano melody. The first line is repeated after the end of the second line. The measure at the end of the first line concludes the melody. (c) Visual templates for the SA training. Numbers represent the fingers (thumb, 1; index finger, 2 and so on) with which the subjects were supposed to press the corresponding piano keys. The rectangles indicate that the left hand is used, the circles mark the right hand. The numbers that were depicted in one horizontal line had to be played simultaneously. The small circles indicated that notes had to be played at double speed.
Figure 2.
Group means of behavioral performance in the auditory discrimination test before and after training: pre, pretraining; post, postraining.
Error bars indicate SEM.
Figure 3.
(a) Group averages of the source waveforms obtained after performing source-space projection before and after training for both groups and hemispheres. Data for the SA-group are shown in the upper row, data for the A-group are shown in the bottom row. Data from the left hemisphere (LH) are presented on the left and those of the right hemisphere (RH) are presented on the right. Thin lines indicate pretraining and thick lines posttraining data. (b) Group averages of the pretraining/posttraining differences of the individual MMN source waveform peak amplitudes from both groups and hemispheres. Left: left hemisphere; right: right hemisphere; seq: sequence. Error bars indicate SEM.
Figure 4.
Group averages of the pretraining/posttraining differences of the individual P2 source waveform peak amplitudes from both groups and hemispheres.
Left: left hemisphere; right: right hemisphere; seq: sequence. Error bars indicate SEM.