Hard problem of consciousness in analytic philosophy

At the end of the XX century David Chalmers came to the conclusion that for modem neuroscience consciousness is something redundant in relation to the brain functioning, calling this problem a «hard problem of consciousness», which is actually a modem formulation of psychophysical problem. This article provides a brief critical overview of the major theories of mind offered by analytical philosophy: information theory (Chalmers, Dubrovsky), emergent materialism, panpsychism (Chalmers) and quantum theory of ontology (Eccles).