Sensory-specific satiety-related olfactory activation of the human orbitofrontal cortex |
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Authors: | O'Doherty J Rolls E T Francis S Bowtell R McGlone F Kobal G Renner B Ahne G |
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Institution: | Department of Experimental Psychology, University of Oxford. |
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Abstract: | When a food is eaten to satiety, its reward value decreases. This decrease is usually greater for the food eaten to satiety than for other foods, an effect termed sensory-specific satiety. In an fMRI investigation it was shown that for a region of the orbitofrontal cortex the activation produced by the odour of the food eaten to satiety decreased, whereas there was no similar decrease for the odour of a food not eaten in the meal. This effect was shown both by a voxel-wise SPM contrast (p <0.05 corrected) and an ANOVA performed on the mean percentage change in BOLD signal in the identified clusters of voxels (p <0.006). These results show that activation of a region of the human orbitofrontal cortex is related to olfactory sensory-specific satiety. |
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