The relationship between binocular and monocular visually evoked potentials elicited by uniform field stimulation

We elicited binocular and monocular VEPs using sinusoidally modulated uniform fields. The amplitudes and phases of the first and second harmonics were used to compare the binocular VEP to the monocular VEPs and their vector sum. We found that 1) binocular VEP first and second harmonic phases are more stable as contrast increases than monocular VEP phases, 2) the binocular VEP first and second harmonic amplitudes are greater than those of monocular VEPs, 3) the binocular VEP first harmonic amplitude is greater than the vector sum of the left and right monocular VEPs, but 4) the binocular VEP second harmonic amplitude equals the vector sum of the monocular VEPs.