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Brain Networks Sensitive to Object Novelty, Value, and Their Combination.
Ali Ghazizadeh1,2, Mohammad Amin Fakharian1, Arash Amini1
1Bio-intelligence Research Unit, Electrical Engineering Department, Sharif University of Technology, Tehran 11365-11155, Iran.
Cerebral Cortex Communications
|September 28, 2020
Summary
Novel and valuable objects attract animals, but brain processing remains unclear. This study reveals distinct brain networks for novelty and value, with a common signal in the temporal-prefrontal network.
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Primate Brain Imaging
Background:
- Novel and valuable objects hold motivational significance for primates.
- Understanding the neural organization of novelty and value processing is limited.
Purpose of the Study:
- To map brain responses to novelty and value in macaques using fMRI.
- To compare neural responses with functional brain network structures.
Main Methods:
- Functional magnetic resonance imaging (fMRI) in macaques.
- Stimuli included visual fractal patterns varying in novelty and value.
- Resting-state functional connectivity analysis.
Main Results:
- Distinct brain networks exhibit unique novelty and value coding patterns.
- Ventral temporal cortex network preferentially encoded novelty.
- Parietal cortex network encoded learned value.
- A temporal-prefrontal (TP) network, along with connected subcortical areas, encoded both dimensions.
Conclusions:
- The temporal-prefrontal (TP) network shows a common neural signal for both novelty and value.
- This common signal may explain shared behavioral responses to novel and valuable items.
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