Journal
NATURE NEUROSCIENCE
Volume 17, Issue 8, Pages 1114-1122Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/nn.3749
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Funding
- Canadian Institutes of Health Research grants
- Japan Society for the Promotion of Science [H23]
- MRC [MC_U105597120] Funding Source: UKRI
- Medical Research Council [MC_U105597120] Funding Source: researchfish
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It remains unclear how the brain represents external objective sensory events alongside our internal subjective impressions of them-affect. Representational mapping of population activity evoked by complex scenes and basic tastes in humans revealed a neural code supporting a continuous axis of pleasant-to-unpleasant valence. This valence code was distinct from low-level physical and high-level object properties. Although ventral temporal and anterior insular cortices supported valence codes specific to vision and taste, both the medial and lateral orbitofrontal cortices (OFC) maintained a valence code independent of sensory origin. Furthermore, only the OFC code could classify experienced affect across participants. The entire valence spectrum was represented as a collective pattern in regional neural activity as sensory-specific and abstract codes, whereby the subjective quality of affect can be objectively quantified across stimuli, modalities and people.
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