Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2020 Mar 30;20(3):7. doi: 10.1167/jov.20.3.7

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

Copyright 2020 The Authors

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

PMC Copyright notice

Figure 2. — Experiment 1 EEG results for the blue-yellow (BY) and green-red (GR) image pairs (n = 14). (A) The asymmetrical response at 3 Hz (F) and its unique harmonics is evident in the baseline-subtracted frequency spectrum, shown here for channel OIz. Its unique, asymmetrical harmonics are labeled up to 27 Hz (9F), the highest frequency giving a significant response at the group level across all 128 channels. The symmetrical response at 6 Hz (2F) and its harmonics are plotted in the same manner, up to 42 Hz (14F). (B) The summed-harmonic baseline-subtracted amplitudes over the occipitoparietal ROI for each 3 and 6 Hz. Individual data are shown with dots, paired by color. (C) The topographical distribution of the summed-harmonic baseline-subtracted amplitudes for each 3 and 6 Hz (top row). The corresponding normalized topographies are also plotted to emphasize the spatial differences, occurring within the occipitoparietal ROI (bottom row). (D) The phase of the 3 Hz response over the average of channels POz, Oz, and OIz. Data are shown with separate vectors for each individual participant, with the angle of the vector representing the cosine phase and the length of the vector representing the baseline-subtracted amplitude over these channels at 3 Hz.