The Cognitive Neuroscience of Music

   157

10

9 8 7 6 5 4 3 2 1

400 Hz 500 Hz 600 Hz 750 Hz

50 μV

30 ms

50 ms

80 ms

1 kHz 2 kHz 3 kHz 4 kHz

1

2

3

4

5

6

7

8

9

10

Figure 10.2Recordings from the medial part of the primary auditory cortex in right HG according to differ-
ent tonal frequencies. Each response corresponds to a monopolar recording of each lead of the electrode
that is referenced to an extracephalic site. The leads are numbered from 1 to 10, from the medial to lateral part of
the auditory cortex. Note the amplitude variations of the 50-ms component (indicated by the star) according to
frequency (see comments in the text). The arrowindicates the onset of the stimulus. Recording time ends at
350 ms.