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Cortical and subcortical signatures of conscious object recognition.
- Source :
-
Nature communications [Nat Commun] 2021 May 18; Vol. 12 (1), pp. 2930. Date of Electronic Publication: 2021 May 18. - Publication Year :
- 2021
-
Abstract
- The neural mechanisms underlying conscious recognition remain unclear, particularly the roles played by the prefrontal cortex, deactivated brain areas and subcortical regions. We investigated neural activity during conscious object recognition using 7 Tesla fMRI while human participants viewed object images presented at liminal contrasts. Here, we show both recognized and unrecognized images recruit widely distributed cortical and subcortical regions; however, recognized images elicit enhanced activation of visual, frontoparietal, and subcortical networks and stronger deactivation of the default-mode network. For recognized images, object category information can be decoded from all of the involved cortical networks but not from subcortical regions. Phase-scrambled images trigger strong involvement of inferior frontal junction, anterior cingulate cortex and default-mode network, implicating these regions in inferential processing under increased uncertainty. Our results indicate that content-specific activity in both activated and deactivated cortical networks and non-content-specific subcortical activity support conscious recognition.
- Subjects :
- Adult
Brain diagnostic imaging
Brain Mapping
Cerebral Cortex diagnostic imaging
Female
Humans
Magnetic Resonance Imaging methods
Male
Nerve Net diagnostic imaging
Nerve Net physiology
Photic Stimulation methods
Visual Cortex diagnostic imaging
Young Adult
Brain physiology
Cerebral Cortex physiology
Consciousness physiology
Recognition, Psychology physiology
Visual Cortex physiology
Subjects
Details
- Language :
- English
- ISSN :
- 2041-1723
- Volume :
- 12
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Nature communications
- Publication Type :
- Academic Journal
- Accession number :
- 34006884
- Full Text :
- https://doi.org/10.1038/s41467-021-23266-x