Equivalent current dipoles of the auditory brain response.

<p><b>(a) Coronal, (b) sagittal, and (c) axial views of the dipole localization rendered on TR images of a subject.</b> The blue dot indicates the M100 dipole, while the red rectangle indicates the M50 dipole. The locations of the two dipoles are localized in the primary auditory cortex. <b>(d) Source waveform of M50 and M100 dipoles.</b> The waveforms of the M100 (in the upper), M50 (in the middle) dipoles, and goodness-of-fit of the two dipoles (in the bottom). A left vertical line indicates the stimulus onset time (t0), whereas a right vertical line corresponds to the time at which M50 dipole is fitted. <b>The topographies of the magnetic fields of (e) M50 and (f) M100.</b> The locations of two dipoles of M50 and M100 are similar, although the orientations of two dipoles are the opposite.