Visual Imagery and Perception Share Neural Representations in the Alpha Frequency Band.

Current Biology : CB
Siying XieRadoslaw M Cichy

Abstract

To behave adaptively with sufficient flexibility, biological organisms must cognize beyond immediate reaction to a physically present stimulus. For this, humans use visual mental imagery [1, 2], the ability to conjure up a vivid internal experience from memory that stands in for the percept of the stimulus. Visually imagined contents subjectively mimic perceived contents, suggesting that imagery and perception share common neural mechanisms. Using multivariate pattern analysis on human electroencephalography (EEG) data, we compared the oscillatory time courses of mental imagery and perception of objects. We found that representations shared between imagery and perception emerged specifically in the alpha frequency band. These representations were present in posterior, but not anterior, electrodes, suggesting an origin in parieto-occipital cortex. Comparison of the shared representations to computational models using representational similarity analysis revealed a relationship to later layers of deep neural networks trained on object representations, but not auditory or semantic models, suggesting representations of complex visual features as the basis of commonality. Together, our results identify and characterize alpha oscilla...Continue Reading

Citations

Nov 25, 2020·Proceedings of the National Academy of Sciences of the United States of America·André M BastosEarl K Miller
Dec 9, 2020·Proceedings of the National Academy of Sciences of the United States of America·Jing LiuGui Xue
Jan 12, 2021·Frontiers in Neuroinformatics·Zitong Lu, Yixuan Ku
Jul 23, 2021·Cerebral Cortex·Diego VidaurreMark W Woolrich
Aug 28, 2021·Brain Sciences·Alicja Różyk-MyrtaMałgorzata Muc-Wierzgoń

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Brainvison
MATLAB
MatConvNet MATLAB Toolbox
MatConvNet
MVPA
Brainstorm
EASYCAP
libsvm package
NSL MATLAB Toolbox
Psychtoolbox

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