Radical Plasticity Thesis

Radical Plasticity Thesis-43
It is argued that the occurrence of any particular conscious scene constitutes a highly informative discrimination, for the reason that conscious scenes are at once ‘’integrated’’ (every conscious scene is experienced “all of a piece”) and ‘’differentiated’’ (every conscious scene is unique).

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.

According to the theory, distributed neural/cognitive models continually produce content in parallel, and conscious content is merely that content which has the biggest impact on the rest of the system.

More recently, Dennett (2001) has utilized the metaphor of ‘fame in the brain’ to describe his theory.

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).

Other automatically activated processors do not enter the global workspace. Any such global pattern can inhibit alternative activity patterns among workspace neurons, thus preventing the conscious processing of alternative stimuli (for example, during the so-called attentional blink).

The global neuronal workspace model predicts that conscious presence is a nonlinear function of stimulus salience; i.e., a gradual increase in stimulus visibility should be accompanied by a sudden transition of the neuronal workspace into a corresponding activity pattern (Dehaene et al. Wallace has advocated a network-theoretic modelling perspective on global workspace theory (Wallace 2005).

While a detailed neuronal model of the dynamic core is lacking, a notable feature of the dynamic core hypothesis is the proposal of a quantitative measure of “neural complexity” (Tononi et al.

1994), high values of which are suggested to accompany consciousness.


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