Neural encoding of food and monetary reward delivery

Shiran Oren, Marc Tittgemeyer, Lionel Rigoux, Marc Schlamann, Tom Schonberg, Bojana Kuzmanovic*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Different types of rewards such as food and money can similarly drive our behavior owing to shared brain processes encoding their subjective value. However, while the value of money is abstract and needs to be learned, the value of food is rooted in the innate processing of sensory properties and nutritional utilization. Yet, the actual consumption of food and the receipt of money have never been directly contrasted in the same experiment, questioning what unique neural processes differentiate those reward types. To fill this gap, we examined the distinct and common neural responses to the delivery of food and monetary rewards during fMRI. In a novel experimental approach, we parametrically manipulated the subjective value of food and monetary rewards by modulating the quantities of administered palatable milkshake and monetary gains. The receipt of increasing amounts of milkshake and money recruited the ventral striatum and the ventromedial prefrontal cortex, previously associated with value encoding. Notably, the consumption and the subsequent evaluation of increasing quantities of milkshake relative to money revealed an extended recruitment of brain regions related to taste, somatosensory processing, and salience. Moreover, we detected a decline of reward encoding in the ventral tegmental area, nucleus accumbens, and vmPFC, indicating that these regions may be susceptible to time-dependent effects upon accumulation of food and money rewards. Relative to monetary gains, the consumption and evaluation of palatable milkshakes engaged complex neural processing over and above value tracking, emphasizing the critical contribution of taste and other sensory properties to the processing of food rewards. Furthermore, our results highlight the need to closely monitor metabolic states and neural responses to the accumulation of rewards to pinpoint the mechanisms underlying time-dependent dynamics of reward-related processing.

Original languageEnglish
Article number119335
JournalNeuroImage
Volume257
DOIs
StatePublished - 15 Aug 2022

Keywords

  • Food
  • Money
  • Primary
  • Reward
  • Taste
  • Value

Fingerprint

Dive into the research topics of 'Neural encoding of food and monetary reward delivery'. Together they form a unique fingerprint.

Cite this