Fig. 1.

Experimental design. (A) An overview of the experimental session, during which participants performed food pictures and taste perception fMRI tasks, separated by two nonscanning behavioral rating tasks. (B and C) During the food pictures fMRI task, subjects viewed pictures of a variety of food and nonfood objects within randomly ordered presentation blocks during scanning. Foods were categorized into predominantly sweet, sour, and salty foods, as well as nonfood familiar objects, selected on the basis of a series of prior experiments with a large online sample of participants. (D) During the taste perception fMRI task, participants received sweet, sour, salty, and neutral tastant solutions, delivered in randomly ordered stimulus blocks, during scanning.