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bioRxiv · 10.1101/2021.06.25.449883

Efficient prestimulus network integration of FFA biases face perception during binocular rivalry

Rassi, E.·Wutz, A.·Peatfield, N. A.·Weisz, N.
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Abstract

Ongoing fluctuations in neural excitability and connectivity influence whether or not a stimulus is seen. Do they also influence which stimulus is seen? We recorded magnetoencepahlography data while participants viewed face or house stimuli, either one at a time or under bi-stable conditions induced through binocular rivalry. Multivariate pattern analysis revealed common neural substrates for rivalrous vs. non-rivalrous stimuli with an additional delay of ~36ms for the bi-stable stimulus and poststimulus signals were source-localized to the fusiform face area (FFA). Prior to stimulus onset followed by a face-vs. house-report, FFA showed stronger connectivity to primary visual cortex and to the rest of the cortex in the alpha frequency range (8-13 Hz) but there were no differences in local oscillatory alpha power. The pre-stimulus connectivity metrics predicted the accuracy of post-stimulus decoding and the delay associated with rivalry disambiguation suggesting that perceptual content is shaped by ongoing neural network states.

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Rassi, E., Wutz, A., Peatfield, N. A., Weisz, N.. 2021-06-25. Efficient prestimulus network integration of FFA biases face perception during binocular rivalry. https://doi.org/10.1101/2021.06.25.449883

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