Right thumb stimulation. First row: results obtained with 10,000 particles and discrepancy 1. (a) shows the clustered reconstructions: most dipoles are located in the left hemisphere in proximity of the somatosensory cortex; however some reconstructions fall in the right hemisphere and are rather unstable. Arguing from such instability that the noise estimate was slightly too tight, we increased the discrepancy parameter to 1.5 to get the cleaner results of the second row.
