Connectivity of human brain measured with TMS and EEG

this paper, we will describe how transcallosal conduction times are determined utilizing activation maps, derived from EEG recorded during TMS experiments. We use the electrophysiological reasoning that the rate of the current-density chance in any cortical area is largest during the onset of neuronal firing. When the maximal activation is reached, the rate of the current-density change slows down to zero. We also trace the activation spread post-stimulus and discuss the physiological explanation of the observed spatial activation pattern