Abstract
[Objective] The relationship between motion stimuli and binocular disparity stimuli was investigated using visual evoked potentials (VEPs). [Method] VEPs were recorded from 13 healthy young adults (males, aged 21–24). Three types of visual stimuli were used optic flow (OF), random dot stereogram (RDS), and a combination of these two types (RDS&OF). [Result] VEPs for OF were composed of two negative peaks around 190 ms (N190) and 250 ms (N250) and one positive peak around 250 ms (P250). VEPs for RDS consisted of two negative peaks around 200 ms (N200) and 300 ms (N300), respectively. VEPs for RDS&OF included the N190, N200, N250, P250, and N300 peaks. The latencies of N250 and P250 differed significantly between OF and RDS&OF, however, N200 amplitudes between RDS and RDS&OF were the same. Signal source estimation by sLORETA suggested that OF and RDS responses were related to motion perception and form perception, respectively. [Discussion] OF and RDS stimuli results showed similar tendencies to those from the previous study. Although the RDS&OF and OF results were similar, it was considered that responses concerning motion perception could be affected by binocular disparity.
