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Title Phase transitions of Integrated Information in the Generalized Ising Model of the Brain
URL
Publication Date
University/Publisher University of Western Ontario
Abstract The bold framework of the Integrated Information Theory of consciousness are explored in this thesis in the context of the generalized Ising model of the brain. Small 5-node networks are simulated on the Ising model with Metropolis transitions where the fitting parameter T is fit to empirical functional connectivity matrices of healthy human subjects. Fitting to criticality, results indicate that integrated information undergoes a phase transition at the critical temperature Tc. The results are interpreted in the context of an emerging perspective of the science of complexity and perhaps even the philosophy of science; the universe as a self-organizing critical system undergoing cascades of phase transitions into complexity.
Subjects/Keywords integrated information; consciousness; ising model; criticality; phase transitionsThe bold framework of the Integrated Information Theory of consciousness are explored in this thesis in the context of the generalized Ising model of the brain. Small 5-node networks are simulated on the Ising model with Metropolis transitions where the fitting parameter $T$ is fit to empirical functional connectivity matrices of healthy human subjects. Fitting to criticality; results indicate that integrated information undergoes a phase transition at the critical temperature $T_c$. The results are interpreted in the context of an emerging perspective of the science of complexity and perhaps even the philosophy of science; the universe as a self-organizing critical system undergoing cascades of phase transitions into complexity.; complexity
Language en
Country of Publication ca
Format application/pdf
Record ID oai:ir.lib.uwo.ca:etd-7178
Repository uwo
Date Retrieved
Date Indexed 2020-06-19

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…give rise to consciousness? Why does it feel like something to be this interacting conglomeration of matter? The first step to understanding is imitation and to that end, in this thesis we use a generalized Ising model to model the brain as a critical

…perspective of the critical brain to explore the interaction of these ideas. Our results indicate that consciousness, an abstract macroscopic object or order parameter, seems to undergo a phase transition at the critical temperature of the Ising model. At the…

…onset of this phase transition, the integrated information (consciousness) generated by the system is maximally susceptible. We interpret our results in light of recent arguments that complexity, life, and consciousness all tend to be critical

…systems through evolution due to the adaptive capabilities of critical systems (Goldenfeld and Woese, 2011; Hopfield, 1994; Mora and Bialek, 2011). While the numeric results of our experiment are simple and succinct, contextualizing our methods…

…phenomena of phase transitions many new ideas also condense out, such as the informational/computational capabilities of critical systems, or their capabilities to adapt/evolve in changing environments. Furthermore, universality can give much-needed relief…

…be understood more succinctly as a realization of a particular universality class(es) whose properties can be simply described by a set of critical exponents which describe the scaling relations of important parameters of the system. There…

…symmetric origins of our cascading universe remain mysterious, the observation of this pattern helps understand how a bridge between the ideal and material world might be built. In the paradigm of the critical brain hypothesis, the critical brain is a…

…consequence of a complex, heterogeneous world. The brain is the system which 4 has evolved over time towards criticality to best imitate, predict and be adaptive to, the dynamic, critical environment in which it resides. This thesis hopes to motivate, among…

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