Carregant...
Fitxers
Tipus de document
ArticleVersió
Versió publicadaData de publicació
Llicència de publicació
Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/171182
What Difference Does it Make? Risk-Taking Behavior in Obesity after a Loss is Associated with Decreased Ventromedial Prefrontal Cortex Activity
Títol de la revista
Director/Tutor
ISSN de la revista
Títol del volum
Recurs relacionat
Resum
Altered activity in decision-making neural circuitry may underlie the maladaptive food choices found in obesity. Here, we aimed to identify the brain regions purportedly underpinning risk-taking behavior in individuals with obesity. Twenty-three adult women with obesity and twenty-three healthy weight controls completed the Risky Gains Task during functional magnetic resonance imaging (fMRI). This task allows participants to choose between a safe option for a small, guaranteed monetary reward and risky options with larger rewards. fMRI analyses comparing losing trials to winning trials found that participants with obesity presented decreased activity in the left anterior insula in comparison to controls (p < 0.05, AlphaSim corrected). Moreover, left insula activation during losses vs. wins was negatively correlated with UPPS-P questionnaire sensation seeking scores. During safe vs. risky trials following a loss, the control group exhibited increased activation in the ventromedial prefrontal cortex (vmPFC) (p < 0.05, AlphaSim corrected) in comparison to the OB group. Moreover, vmPFC response in the obesity group during post-loss trials was negatively correlated with risky choices on the task overall. As a whole, our findings support that diminished tuning of the insula towards interoceptive signals may lead to a lack of input to the vmPFC when weighing the costs and benefits of risky choices.
Matèries (anglès)
Citació
Citació
STEWARD, Trevor, JUANEDA SEGUÍ, Asier, MESTRE-BACH, Gemma, MARTÍNEZ ZALACAÍN, Ignacio, VILARRASA, Nuria, JIMÉNEZ-MURCIA, Susana, FERNÁNDEZ FORMOSO, Jose a., VECIANA DE LAS HERAS, Misericordia, CUSTAL, Nuria, VIRGILI, Núria, LÓPEZ URDIALES, Rafael, GARCÍA RUIZ DE GORDEJUELA, Amador, MENCHÓN MAGRIÑÁ, José manuel, SORIANO MAS, Carles, FERNÁNDEZ ARANDA, Fernando. What Difference Does it Make? Risk-Taking Behavior in Obesity after a Loss is Associated with Decreased Ventromedial Prefrontal Cortex Activity. _Journal of Clinical Medicine_. 2019. Vol. 8, núm. 10, pàgs. 1551. [consulta: 23 de gener de 2026]. ISSN: 2077-0383. [Disponible a: https://hdl.handle.net/2445/171182]