Measuring Integration Processes in Visual Symmetry with Frequency-Tagged EEG.

ABSTRACT: Symmetry is a highly salient feature of the natural world which requires integration of visual features over space. The aim of the current work is to isolate dynamic neural correlates of symmetry-specific integration processes. We measured steady-state visual evoked potentials (SSVEP) as participants viewed symmetric patterns comprised of distinct spatial regions presented at two different frequencies (f₁ and f₂). We measured intermodulation components, shown to reflect non-linear processing at the neural level, indicating integration of spatially separated parts of the pattern. We generated a wallpaper pattern containing two reflection symmetry axes by tiling the plane with a two-fold reflection symmetric unit-pattern and split each unit-pattern diagonally into separ

SUBMITTER: Alp N 

PROVIDER: S-EPMC5934372 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature