Dissociable Neural Information Dynamics of Perceptual Integration and Differentiation during Bistable Perception.
Billig, Alexander J
Garcia, María Del Carmen
Cerebral cortex (New York, N.Y. : 1991)
Oxford University Press (OUP)
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Canales-Johnson, A., Billig, A. J., Olivares, F., Gonzalez, A., Garcia, M. D. C., Silva, W., Vaucheret, E., et al. (2020). Dissociable Neural Information Dynamics of Perceptual Integration and Differentiation during Bistable Perception.. Cerebral cortex (New York, N.Y. : 1991), 30 (8), 4563-4580. https://doi.org/10.1093/cercor/bhaa058
At any given moment, we experience a perceptual scene as a single whole and yet we may distinguish a variety of objects within it. This phenomenon instantiates two properties of conscious perception: integration and differentiation. Integration to experience a collection of objects as a unitary percept, and differentiation to experience these objects as distinct from each other. Here we evaluated the neural information dynamics underlying integration and differentiation of perceptual contents during bistable perception. Participants listened to a sequence of tones (auditory bistable stimuli) experienced either as a single stream (perceptual integration) or as two parallel streams (perceptual differentiation) of sounds. We computed neurophysiological indices of information integration and information differentiation with electroencephalographic and intracranial recordings. When perceptual alternations were endogenously driven, the integrated percept was associated with an increase in neural information-integration and a decrease in neural differentiation across frontoparietal regions, whereas the opposite pattern was observed for the differentiated percept. However, when perception was exogenously driven by a change in the sound stream (no bistability) neural oscillatory power distinguished between percepts but information measures did not. We demonstrate that perceptual integration and differentiation can be mapped to theoretically motivated neural information signatures, suggesting a direct relationship between phenomenology and neurophysiology.
This research was supported by a Wellcome Trust Biomedical Research Fellowship WT093811MA and the Chilean National Fund for Scientific and Technological Development Grant 1171200
MRC COGNITION & BRIAN SCIENCES UNIT (FB WELLCOME TRUST) (093811/Z/10/Z)
Wellcome Trust (unknown)
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External DOI: https://doi.org/10.1093/cercor/bhaa058
This record's URL: https://www.repository.cam.ac.uk/handle/1810/302691
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