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IPM
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“School of Cognitive”

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Paper   IPM / Cognitive / 16316
School of Cognitive Sciences
  Title:   Brain networks sensitive to object novelty, value, and their combination
  Author(s): 
1.  A. Ghazizadeh
2.  M. Fakharian
3.  A. Amini
4.  W. Griggs
5.  D. Leopold
6.  O. Hikosaka
  Status:   Published
  Journal: Cerebral Cortex
  Year:  2020
  Pages:   1-48
  Supported by:  IPM
  Abstract:
Novel and valuable objects are motivationally attractive for animals including primates. However, little is known about how novelty and value processing is organized across the brain. We used fMRI in macaques to map brain responses to visual fractal patterns varying in either novelty or value dimensions and compared the results to the structure of functionally connected brain networks determined at rest. The results show that different brain networks possess unique combinations of novelty and value coding. One network identified in the ventral temporal cortex preferentially encoded object novelty, whereas another in the parietal cortex encoded the learned value. A third network, broadly composed of temporal and prefrontal areas (TP network), along with functionally connected portions of the striatum, amygdala, and claustrum, encoded both dimensions with similar activation dynamics. Our results support the emergence of a common currency signal in the TP network that may underlie the common attitudes toward novel and valuable objects.

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