Asymmetrical hemispheric EEG activation evoked by stimulus position during the Simon task

摘要: The Simon effect has been previously shown to be asymmetric at both the behavioral and electrophysiological levels. present investigation was aimed clarify whether, during a task, hemispheric asymmetry is also observed in early phases of stimulus processing. In group healthy subjects performing we analyzed scalp potentials evoked by first lateralized cue (left or right), instead classical readiness potential preceding motor response. ERP results showed significant left cortical activation stimuli presented right visual field 140-160 ms time window. Instead, elicited versus hemisphere starting next 160-180 interval. We linked this that data: recorded with smaller than stimuli. Results confirm hypothesis handed subjects, specialized for response selection able process faster does