The association between loneliness or social isolation and food and eating behaviours: A scoping review

Hanna, Katherine; Cross, Jenna; Nicholls, Amy; Gallegos, Danielle

doi:10.1016/j.appet.2023.107051

Cited by 2 publications

(1 citation statement)

References 65 publications

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“…Comparing food discounting with money discounting revealed significantly enhanced activity in only one brain region, namely, the temporoparietal junction (TPJ), which is involved in reasoning beliefs of others ( Samson et al, 2004 ; Schurz et al, 2013 ), social perspective taking ( van den Bos et al, 2010 ), and making sense of another mind ( Saxe and Wexler, 2005 ). In many societies, sharing food is a common practice, and food often serves as a symbol of hospitality and community ( Hanna et al, 2023 ). In the context of larger food amounts, individuals in our study might have considered sharing food with others, which includes considering others’ preferences and needs.…”

Section: Discussionmentioning

confidence: 99%

Differences in Discounting Behavior and Brain Responses for Food and Money Reward

Markman,

Saruco,

Al-Bas

et al. 2024

eNeuro

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Most neuroeconomic research seeks to understand how value influences decision-making. The influence of reward type is less well understood. We used functional magnetic resonance imaging (fMRI) to investigate delay discounting of primary (i.e., food) and secondary rewards (i.e., money) in 28 healthy, normal-weighted participants (mean age = 26.77; 18 females). To decipher differences in discounting behavior between reward types, we compared how well-different option-based statistical models (exponential, hyperbolic discounting) and attribute-wise heuristic choice models (intertemporal choice heuristic, dual reasoning and implicit framework theory, trade-off model) captured the reward-specific discounting behavior. Contrary to our hypothesis of different strategies for different rewards, we observed comparable discounting behavior for money and food (i.e., exponential discounting). Higherkvalues for food discounting suggest that individuals decide more impulsive if confronted with food. The fMRI revealed that money discounting was associated with enhanced activity in the right dorsolateral prefrontal cortex, involved in executive control; the right dorsal striatum, associated with reward processing; and the left hippocampus, involved in memory encoding/retrieval. Food discounting, instead, was associated with higher activity in the left temporoparietal junction suggesting social reinforcement of food decisions. Although our findings do not confirm our hypothesis of different discounting strategies for different reward types, they are in line with the notion that reward types have a significant influence on impulsivity with primary rewards leading to more impulsive choices.

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