Figure 1.

fMRI Paradigm. Subjects were placed in a supine position into the scanner and instructed to focus on a central fixation crosshair displayed via a rear-mounted projector [PowerLite 7300 video projector (Epson America, Inc., Long Beach, CA, USA)] and viewed through a head coil-mounted mirror. After sound offset, this crosshair was replaced with a visual prompt containing emoticons representing the four emotion choices and the corresponding response button number. Auditory stimuli were presented through pneumatic headphones and sound presentation occurred between volume collections to minimize any potential impact of scanner noise on stimulus processing.