How the brain represents the reward value of fat in the mouth.

Grabenhorst, F., Rolls, E. T., Parris, B. and De Souza, A., 2009. How the brain represents the reward value of fat in the mouth. Cerebral Cortex.

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DOI: 10.1093/cercor/bhp169

Abstract

The palatability and pleasantness of the sensory properties of foods drive food selection and intake and may contribute to overeating and obesity. Oral fat texture can make food palatable and pleasant. To analyze its neural basis, we correlated humans’ subjective reports of the pleasantness of the texture and flavor of a high- and low-fat food with a vanilla or strawberry flavor, with neural activations measured with functional magnetic resonance imaging. Activity in the midorbitofrontal and anterior cingulate cortex was correlated with the pleasantness of oral fat texture and in nearby locations with the pleasantness of flavor. The pregenual cingulate cortex showed a supralinear response to the combination of high fat and pleasant, sweet flavor, implicating it in the convergence of fat texture and flavor to produce a representation of highly pleasant stimuli. The subjective reports of oral fattiness were correlated with activations in the midorbitofrontal cortex and ventral striatum. The lateral hypothalamus and amygdala were more strongly activated by high- versus low-fat stimuli. This discovery of which brain regions track the subjective hedonic experience of fat texture will help to unravel possible differences in the neural responses in obese versus lean people to oral fat, a driver of food intake.

Item Type:Article
Uncontrolled Keywords:appetite • cingulate cortex • emotion • flavor • insular cortex • orbitofrontal cortex • taste
Subjects:Psychology
Group:Faculty of Science and Technology
ID Code:12203
Deposited By:Dr Ben Parris
Deposited On:11 Nov 2009 19:51
Last Modified:10 Sep 2014 15:47

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