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Higher-order consciousness, distinguished in humans by an explicit sense of self and the ability to construct past and future scenes, arose at a later stage with reentrant pathways linking value-dependent categorization with linguistic performance and conceptual memory (Edelman 2003).
The notion of global availability is suggested to explain the association of consciousness with integrative cognitive processes such as attention, decision making and action selection.
Also, because global availability is necessarily limited to a single stream of content, GW theory may naturally account for the serial nature of conscious experience.
Neural complexity measures the extent to which the dynamics of a neural system are both integrated and differentiated (Tononi et al. The component parts of a neurally complex system are differentiated; however, as larger and larger subsets of elements are considered they become increasingly integrated. The dynamic core hypothesis fits within an extended conceptual model of consciousness provided by the TNGS (Edelman 2003; Seth and Baars 2005).
According to the TNGS, primary (sensory) consciousness arose in evolution when ongoing perceptual categorization was linked via reentry to a value-dependent memory creating the so-called “remembered present” (Edelman 1989).
2005), useful models can be either mathematical/logical or verbal/conceptual.
Models of consciousness should be distinguished from so-called neural correlates of consciousness (Crick & Koch 1990).
GW theory was originally described in terms of a ‘blackboard’ architecture in which separate, quasi-independent processing modules interface with a centralized, globally available resource (Baars 1988).
This cognitive level of description is preserved in the computational models of Franklin and Graesser (1999), who proposed a model consisting of a population of interacting ‘software agents’, and Shanahan (2005), whose model incorporates aspects of internal simulation supporting executive control and more recently spiking neurons (Shanahan, 2008).
The emergence of giant components in dynamic networks can be considered as a phase transition.
Multiple drafts theory was introduced by Daniel Dennett (1991) to challenge the idea of a ‘Cartesian theatre’ where all perceptions, thoughts, and the other mental contents are presented to a conscious observer.