Results of one representative subject. Top: Averaged auditory evoked magnetic fields. The waveform exhibits a clear N1m response peaking around the latency of 0.1 s. Bottom: Magnetic contour map and estimated single dipole at the latency of the maximal N1 m response are illustrated together with brain surface reconstructed from the individual MRI. Red and blue contour lines represent outbound and inbound magnetic field flow from and into the brain. The sphere and barrel in the brain indicate the location and orientation of a single equivalent current dipole in the right hemisphere.
Lagemann et al. BMC Neuroscience 2010 11:156 doi:10.1186/1471-2202-11-156