INTERPRETING MAGNETIC-FIELDS OF THE BRAIN - MINIMUM NORM ESTIMATES

The authors have applied estimation theory to the problem of determini ng primary current distributions from measured neuromagnetic fields. I n this procedure, essentially nothing is assumed about the source curr ents, except that they are spatially restricted to a certain region. S imulation experiments show that the results can describe the structure of the current flow fairly well. By increasing the number of measurem ents, the estimate can be made more localised. The current distributio ns may be also used as an interpolation and extrapolation for the meas ured field patterns.