Distilling the neural correlates of consciousness

Document Type: 
Article
Article Type: 
Theoretical
Disciplines: 
Neuroscience
Topics: 
Neural Correlates of Consciousness
Keywords: 
NCC, contrastive analysis, visual awareness, theories of consciousness
Date of Issue: 
2012
Authors: 
Aru, Jaan and Bachmann, Talis and Singer, Wolf and Melloni, Lucia
Journal/Publication Title: 
Neuroscience & Biobehavioral Reviews
Volume: 
36
Page Range: 
737-746
Official URL: 
http://www.sciencedirect.com/science/article/pii/S0149763411002107
Publish status: 
Published
Abstract: 

Solving the problem of consciousness remains one of the biggest challenges in modern science. One key step towards understanding consciousness is to empirically narrow down neural processes associated with the subjective experience of a particular content. To unravel these neural correlates of consciousness (NCC) a common scientific strategy is to compare perceptual conditions in which consciousness of a particular content is present with those in which it is absent, and to determine differences in measures of brain activity (the so called “contrastive analysis”). However, this comparison appears not to reveal exclusively the NCC, as the NCC proper can be confounded with prerequisites for and consequences of conscious processing of the particular content. This implies that previous results cannot be unequivocally interpreted as reflecting the neural correlates of conscious experience. Here we review evidence supporting this conjecture and suggest experimental strategies to untangle the NCC from the prerequisites and consequences of conscious experience in order to further develop the otherwise valid and valuable contrastive methodology.

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