Persistent operational synchrony within brain default-mode network and self-processing operations in healthy subjects
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Ezio Di Nucci
Jack Alan Reynolds
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Brain and Cognition 75 (2):79-90 (2011)
Based on the theoretical analysis of self-consciousness concepts, we hypothesized that the spatio-temporal pattern of functional connectivity within the default-mode network (DMN) should persist unchanged across a variety of different cognitive tasks or acts, thus being task-unrelated. This supposition is in contrast with current understanding that DMN activated when the subjects are resting and deactivated during any attention-demanding cognitive tasks. To test our proposal, we used, in retrospect, the results from our two early studies ([Fingelkurts, 1998] and [Fingelkurts et al., 2003]). In both studies for the majority of experimental trails we indeed found a constellation of operationally synchronized cortical areas (indexed as DMN) that was persistent across all studied experimental conditions in all subjects. Furthermore, we found three major elements comprising this DMN: two symmetrical occipito-parieto-temporal and one frontal spatio-temporal patterns. This new data directly supports the notion that DMN has a specific functional connotation – it provides neurophysiologic basis for self-processing operations, namely first-person perspective taking and an experience of agency. -/- .
|Keywords||EEG Alpha rhythm Brain operations Metastability Neurophysiological pattern Resting state Default mode Synchronization Functional connectivity self-consciousness first-person perspective|
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S. Lipari, F. Baglio, L. Griffanti, L. Mendozzi, M. Garegnani, A. Motta, P. Cecconi & L. Pugnetti (2012). Altered and Asymmetric Default Mode Network Activity in a “Hypnotic Virtuoso”: An fMRI and EEG Study. Consciousness and Cognition 21 (1):393-400.
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