Non-invasive investigation of the human visual cortex
2022
Ernst Strüngmann Institute (ESI) for Neuroscience in Cooperation with Max Planck Society, Frankfurt, Germany
Strong gamma-band oscillations in the early visual cortex (the part of the cerebral cortex in which visual stimuli are processed) can be induced by homogeneous colour surfaces and particularly strong gamma oscillations have been reported for red stimuli. The aim of this study was to investigate, whether this strong response to red colour is based on the colour itself or on other factors.
Therefore, magnetoencephalography (MEG) was recorded for 30 human participants while presenting them with uniform, circular colour disks.
With colours that had identical luminance and identical colour contrast, it could not be confirmed that red stimuli induce stronger gamma responses compared to stimuli of other colours. Moreover, it was demonstrated that colour-induced gamma-band responses can be studied non-invasively in humans.
Human visual gamma for color stimuli
Pascal Fries, Benjamin J Stauch
Added on: 01-23-2023
[1] https://elifesciences.org/articles/75897
