Bisensory Evoked Potentials: A Single-sweep Analysis Via Template Reference And Parametric Identification

A method is presented to identify the component related to each stimulus in the brain potential evoked via bisensorial simultaneous stimulation (visual and somatic). On a single trial basis, it is possible to show that the p resence of the somatic stimulus induces on the visual cortex not only a spread of the elctromagnetic field originating from the v ertex, but also a modification in the visual component of the multisensorial p otential, s ign of a corticocortical interaction a t latencies around 200 msec from the stimuli onset.