Grand-average event-related potentials elicited by audiovisual stimuli and (auditory plus visual).

<p>Event-related potentials of the sum of the unimodal stimuli (A+V) and bimodal (AV) stimuli at a subset of electrodes are shown from 100 ms before the stimulus to 600 ms after. (A) Auditory stimuli from the front. (B) Auditory stimuli from the back. (C) Auditory stimuli from the left. (D) Auditory stimuli from the right. The square areas indicate the time periods when the bimodal response significantly differs from the sum of the unimodal responses (p<0.01). (A_FV, A_BV, A_LV, A_RV: unimodal auditory stimuli of bimodal audiovisual stimuli were presented at the front, back, left and right of the subjects, respectively; A_F, A_B, A_L, A_R: unimodal auditory stimuli were presented at the front, back, left and right of the subjects, respectively).