Binocular interaction reflected in visually evoked cortical potentials as studied with pseudorandom stimuli.

摘要: PURPOSE. To study the interaction of visual signals from both eyes with evoked cortical potentials (VECPs) elicited by pseudorandom binary sequence (PRBS) stimuli. METHODS. A PRBS was used to drive two independent LED arrays elicit VECPs. The right and left were simultaneously stimulated different series impulse response function each eye calculated raw data cross-correlating response. effect changing luminosity LEDs parametrically on responses obtained evaluated. RESULTS. response, 10 volunteers normal vision, had characteristics similar conventional VECP, a major positive peak at 110 ms (P110). When bilaterally exposed stimuli same luminosity, P110 amplitudes decreased amount that stimulating only one eye. in different, VECP amplitude dimmer decreased, contralateral increased. CONCLUSIONS. results clearly demonstrate interocular luminance can be detected electrophysiologically subjects using PRBS- driven which feasibility recording independently.