Keywords: phenomenal consciousness, access consciousness, global workspace, attention, neural network.
In this article I try to sum up the philosophical debate about consciousness,
suggesting a naturalistic and reductionistic theory of consciousness. This theory
aims to connect Block's distinction between phenomenal and access consciousness
with Global Workspace model, both central in a current debate about
neural correlates of consciousness. Indeed a unifying global workspace model
for phenomenal and access consciousness is proposed. This model describes
the neural bases and neural dynamic of phenomenal and access consciousness,
and the relationship of this two forms of consciousness with distributed and
selective attention. The model is implemented in neural network form, with
simulation of visual object processing.