del Rio, Magdalena and Greenlee, Mark W. and Volberg, Gregor (2018) Neural dynamics of breaking continuous flash suppression. NEUROIMAGE, 176. pp. 277-289. ISSN 1053-8119, 1095-9572
Full text not available from this repository. (Request a copy)Abstract
Sensory input to the human visual system often becomes accessible to cognition and overt report during processing. We investigated neural precursors of conscious vision using EEG recordings and the popular breaking continuous flash suppression (bCFS) paradigm. In this technique, a mask consisting of high-contrast dynamic patterns is presented to one eye, predominating over a target stimulus presented to the other eye. The time needed for the target stimulus to overcome the suppression is thought to reflect the transition from unconscious to conscious perception. In bCFS trials with slow responses, indicative of potent suppression, a time-frequency analysis showed reduced occipital gamma power (33-38 Hz) contralaterally to the visual hemifield where the target was presented 0.27 to 0.21 s prior to the behavioral response. This neural activity was concurrent with a local phase reset and enhanced long-range phase synchronization in the theta band (7 Hz). Such a pattern did not arise in a control condition in which suppression was not induced. Thus, the theta phase reset and synchronization in bCFS trials precede a break from suppression, likely initiating a re-routing of information such that the neural representation of the target is updated more efficiently than that of the competing mask. Overall, these findings mark the emergence of a binocularly integrated percept that can be consciously selected for a behavioral response.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | BINOCULAR-RIVALRY; VISUAL-PERCEPTION; GAMMA-ACTIVITY; EFFECT SIZE; EEG-DATA; PHASE; CONSCIOUSNESS; STIMULI; OSCILLATIONS; ALPHA; EEG; Breaking continuous flash suppression; Visual perception; Consciousness |
| Subjects: | 100 Philosophy & psychology > 150 Psychology |
| Divisions: | Psychology and Pedagogy > Institut für Psychologie Psychology and Pedagogy > Institut für Psychologie > Lehrstuhl für Psychologie I (Allgemeine Psychologie I und Methodenlehre) - Prof. Dr. Mark W. Greenlee |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 05 Mar 2020 13:04 |
| Last Modified: | 05 Mar 2020 13:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14110 |
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