The Influence of the Stimulus Design on the Harmonic Components of the Steady-State Visual Evoked Potential.

ABSTRACT: Steady-state visual evoked potentials (ssVEPs) are commonly used for functional objective diagnostics. In general, the main response at the stimulation frequency is used. However, some studies reported the main response at the second harmonic of the stimulation frequency. The aim of our study was to analyze the influence of the stimulus design on the harmonic components of ssVEPs. We studied 22 subjects (8 males, mean age ± SD = 27 ± 4.8 years) using a circular layout (r ₁ = 0-1.6°, r ₂ = 1.6-3.5°, r ₃ = 3.5-6.4°, r ₄ = 6.4-10.9°, and r ₅ = 10.9-18°). At a given eccentricity, the stimulus was presented according to a 7.5 Hz square wave with 50% duty cycle. To analyze the influence of the stimulus ecce

SUBMITTER: Solf B 

PROVIDER: S-EPMC7509136 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature