Auditory evoked magnetic fields: analysis of the N100/P200 signal

We propose a method to analyse the N100/P200 structure observed in auditory evoked magnetic fields. Based in linear cable theory for passive dendritic conduction we assume an expression for the time-course of the equivalent current dipole moment and show that good agreement can be obtained with experimental results. The analysis leads to realistic values for the membrane time constant (approximately 30 ms) and the reduced dendritic length (approximately 2).