Figure 1. Overview of the fMRI experiment (IMAGE)

Institute for Basic Science

Figure 1. Overview of the fMRI experiment

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Left: Fluids were delivered using an MR-compatible fluid delivery system (gustometer) and removed from participants’ mouths during the experiment using a suction device.

Middle: Capsaicin or chocolate fluid was delivered twice during the scan, with a duration of 1.5 minutes each for capsaicin fluid and a duration of 3 minutes each for chocolate fluid. The entire run lasted 14.5 minutes.

Right: Participants continuously rated pleasantness or unpleasantness (purple: pain, yellow: pleasure) while receiving capsaicin and chocolate (n = 58).

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