Abstract:
:Neurobiological theories of awareness propose divergent accounts of the spatial extent of brain changes that support conscious perception. Whereas focal theories posit mostly local regional changes, global theories propose that awareness emerges from the propagation of neural signals across a broad extent of sensory and association cortex. Here we tested the scalar extent of brain changes associated with awareness using graph theoretical analysis applied to functional connectivity data acquired at ultra-high field while subjects performed a simple masked target detection task. We found that awareness of a visual target is associated with a degradation of the modularity of the brain's functional networks brought about by an increase in intermodular functional connectivity. These results provide compelling evidence that awareness is associated with truly global changes in the brain's functional connectivity.
journal_name
Proc Natl Acad Sci U S Aauthors
Godwin D,Barry RL,Marois Rdoi
10.1073/pnas.1414466112subject
Has Abstractpub_date
2015-03-24 00:00:00pages
3799-804issue
12eissn
0027-8424issn
1091-6490pii
1414466112journal_volume
112pub_type
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