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Trends Cogn Sci. 2005 Feb;9(2):46-52.

Two neural correlates of consciousness.

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  • 1Departments of Philosophy and Psychology, New York University, 100 Washington Square East, New York, NY 10003-6688, USA.


Neuroscientists continue to search for "the" neural correlate of consciousness (NCC). In this article, I argue that a framework in which there are at least two distinct NCCs is increasingly making more sense of empirical results than one in which there is a single NCC. I outline the distinction between phenomenal NCC and access NCC, and show how they can be distinguished by experimental approaches, in particular signal-detection theory approaches. Recent findings in cognitive neuroscience provide an empirical case for two different NCCs.

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