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Errors as a Means of Reducing Impulsive Food Choice
Published on: June 5, 2016
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Choice Behavior Guided by Learned, But Not Innate, Taste Aversion Recruits the Orbitofrontal Cortex.
Leticia Ramírez-Lugo1, Ana Peñas-Rincón1, Sandybel Ángeles-Durán1
1Instituto de Fisiología Celular-Neurociencias, Universidad Nacional Autónoma de México, 04510 Ciudad de México, México.
Summary
The orbitofrontal cortex (OFC) guides choice behavior based on taste memories, while the insular cortex stores these memories. OFC inactivation impairs choice but not memory retrieval.
Area of Science:
- Neuroscience
- Behavioral Neuroscience
- Decision Making
Background:
- Emotional experiences critically guide survival behaviors, particularly in selecting safe ingested stimuli.
- Understanding how stored emotional associations influence choice behavior is vital but remains underexplored.
Purpose of the Study:
- To investigate the neural mechanisms underlying choice-based behavioral guidance using emotional memories.
- To differentiate the roles of the orbitofrontal cortex (OFC) and insular cortex in taste aversion memory and choice selection.
Main Methods:
- Local pharmacological inactivation of rat cortical regions (OFC, medial prefrontal cortex, insular cortex).
- Utilized choice-based and no-choice conditioned taste aversion (CTA) tasks.
- Assessed memory retrieval and choice behavior, with OFC activity measured via c-Fos immunolabeling.
Main Results:
- OFC inactivation specifically blocked choice-based CTA retrieval, leaving no-choice CTA intact.
- Insular cortex inactivation impaired retrieval in both choice and no-choice CTA tasks.
- OFC activity was elevated in choice conditions, suggesting its role in selection, not memory storage.
Conclusions:
- The orbitofrontal cortex (OFC) is crucial for guiding choice behavior informed by taste-associated emotional memories.
- The anterior insular cortex (AIC) is essential for the storage and retrieval of taste aversion memories.
- OFC's role in choice selection is dissociable from AIC-dependent memory processes.
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